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2026 Edition

Best Inside Sales Services in JapanTop 13 Companies Compared | Pricing, Track Records & Selection Guide

Looking for the best Inside Sales service in Japan? We compare the top 13 companies by expertise, pricing, track record, and capabilities. Expert analysis from a team with 10+ years of digital marketing experience.

Get Free ConsultationSee Top 13 Companies

Table of Contents

1
What is Inside Sales?
Definition & concepts
2
Why Inside Sales Matters Now
Market data & trends
3
5 Selection Criteria
How to choose wisely
4
Top 13 Companies
Detailed comparison
5
Comparison Table
At-a-glance overview
6
Pricing Guide
Cost breakdown
7
Implementation Steps
5-step process
8
Success Stories
Real results
9
Best Inside Sales Company for Your Specific Needs
Matched to your needs
10
FAQ
12 expert answers
11
Glossary
Key terms defined
12
Summary
Key takeaways
Radineer編集部

執筆：Radineer編集部

デジタルマーケティング・AI活用の専門チーム

Radineer編集部は、SEO・LLMO・生成AI活用の専門家チームです。最新のデジタルマーケティングトレンドと実践的なノウハウを、わかりやすくお届けします。

1

What is Inside Sales?

Inside Sales Services help businesses build and optimize remote sales operations including lead qualification, appointment setting, and sales process automation.

Inside Sales is a critical business function in the Japanese market, where companies face unique challenges including language barriers, cultural nuances, and rapidly evolving digital landscapes. Professional inside sales services provide the expertise needed to navigate these complexities effectively.

In 2026, the integration of AI technology has transformed how inside sales is delivered, with leading providers leveraging tools like ChatGPT, Claude, and custom AI systems to enhance results and efficiency.

2

Why Inside Sales Matters Now

67%
of companies plan to increase inside sales investment
3-5x
typical ROI from inside sales
<20%
of Japanese companies have optimized their approach

The Japanese market is experiencing rapid digital transformation, making professional inside sales services more important than ever. Companies that invest in quality inside sales gain a significant competitive advantage.

With the rise of AI search and changing consumer behavior, an integrated approach to inside sales that includes traditional and AI-optimized strategies is becoming the standard for success.

3

5 Criteria for Choosing a Inside Sales Service

1

Proven Track Record

Look for companies with demonstrable experience in inside sales with case studies and measurable results in the Japanese market.

2

Service Comprehensiveness

Ensure the provider covers all aspects of inside sales from strategy to implementation to ongoing optimization.

3

Technology & Innovation

In 2026, providers should leverage AI and modern technology. Ask about their approach to AI integration and automation.

4

Reporting & Transparency

Regular reporting with clear KPIs and data-driven insights is essential. Avoid providers who cannot demonstrate measurable outcomes.

5

Cost-Effectiveness

Compare pricing against service scope and expected outcomes. The cheapest option is rarely the best value. Focus on ROI potential.

每周AI资讯（免费）

每周二推送AI应用技巧和案例

4

Top 13 Inside Sales Companies in Japan

We evaluated 13 leading companies based on expertise, track record, pricing, technical capabilities, and client satisfaction.

#1 Recommended
1

Radineer(ライナー)

Toshima-ku, Tokyo

Key Strengths

  • Marketing × Inside Sales integration for higher conversion rates
  • AI-powered lead scoring and optimal timing analysis
  • SEO-generated lead qualification for quality pipeline
  • From ¥200,000/month with transparent reporting

Services

SDR/BDR OperationsLead QualificationAppointment SettingSales AnalyticsCRM Integration

Pricing

¥200,000+/month

Best For

Companies wanting inside sales integrated with digital marketing

Contact Radineer for Free Consultation
2

SALES ROBOTICS(SALES ROBOTICS)

Chuo-ku, Tokyo

Key Strengths

  • Inside sales and sales automation specialist
  • Specialized inside sales outsourcing and consulting capabilities with strong Japan market presence
  • Core expertise: Inside sales outsourcing, lead qualification, sales tech

Services

Inside sales outsourcinglead qualificationsales techSDR/BDRLead Qualification

Pricing

¥500,000+/month

Best For

Companies seeking specialized inside sales outsourcing and consulting expertise in a focused area

3

CEREBRIX Inc.(セレブリックス)

Shinjuku-ku, Tokyo

Key Strengths

  • Sales outsourcing and consulting company
  • Comprehensive inside sales outsourcing and consulting capabilities with strong Japan market presence
  • Core expertise: Sales outsourcing, inside sales, sales training

Services

Sales outsourcinginside salessales trainingSDR/BDRLead Qualification

Pricing

¥700,000+/month

Best For

Mid-to-large companies wanting comprehensive inside sales outsourcing and consulting support

4

BeTrade Inc.(ビートレード)

Shibuya-ku, Tokyo

Key Strengths

  • Leading inside sales outsourcing and consulting provider in the Japanese market
  • Extensive enterprise client portfolio with proven results
  • Comprehensive service coverage and dedicated account management

Services

SDR/BDRLead QualificationAppointment SettingSales Tech

Pricing

¥400,000+/month

Best For

Enterprise and mid-market companies seeking established Inside Sales expertise

5

SMARTCAMP Inc.(スマートキャンプ)

Minato-ku, Tokyo

Key Strengths

  • B2B SaaS comparison platform (BOXIL)
  • Specialized inside sales outsourcing and consulting capabilities with strong Japan market presence
  • Core expertise: SaaS comparison, lead generation, B2B media

Services

SaaS comparisonlead generationB2B mediaSDR/BDRLead Qualification

Pricing

¥500,000+/month

Best For

Companies seeking specialized inside sales outsourcing and consulting expertise in a focused area

6

LEAGLE Inc.(リーグル)

Minato-ku, Tokyo

Key Strengths

  • Inside sales and BDR services company
  • Specialized inside sales outsourcing and consulting capabilities with strong Japan market presence
  • Core expertise: Inside sales, lead generation, appointment setting

Services

Inside saleslead generationappointment settingSDR/BDRLead Qualification

Pricing

¥600,000+/month

Best For

Companies seeking specialized inside sales outsourcing and consulting expertise in a focused area

7

Will of Work Inc.(ウィルオブ・ワーク)

Shinjuku-ku, Tokyo

Key Strengths

  • Specialized inside sales outsourcing and consulting expertise with strong domain knowledge
  • Proven track record with mid-market and growing companies
  • Technology-driven approach with proprietary tools and methodologies

Services

SDR/BDRLead QualificationAppointment SettingSales Tech

Pricing

¥400,000+/month

Best For

Mid-market companies wanting specialized Inside Sales capabilities

8

sora Project(soraプロジェクト)

Fukuoka City, Fukuoka

Key Strengths

  • Specialized inside sales outsourcing and consulting expertise with strong domain knowledge
  • Proven track record with mid-market and growing companies
  • Technology-driven approach with proprietary tools and methodologies

Services

SDR/BDRLead QualificationAppointment SettingSales Tech

Pricing

¥300,000+/month

Best For

Mid-market companies wanting specialized Inside Sales capabilities

9

Ambient Navi Inc.(アンビエントナビ)

Shibuya-ku, Tokyo

Key Strengths

  • Focused inside sales outsourcing and consulting services with niche market expertise
  • Agile operations with personalized client attention
  • Competitive pricing and flexible engagement models

Services

SDR/BDRLead QualificationAppointment SettingSales Tech

Pricing

¥200,000+/month

Best For

SMBs and growing companies seeking accessible Inside Sales services

10

Confidence Inc.(コンフィデンス)

Minato-ku, Tokyo

Key Strengths

  • Focused inside sales outsourcing and consulting services with niche market expertise
  • Agile operations with personalized client attention
  • Competitive pricing and flexible engagement models

Services

SDR/BDRLead QualificationAppointment SettingSales Tech

Pricing

¥500,000+/month

Best For

SMBs and growing companies seeking accessible Inside Sales services

11

SAIRU Inc.(才流)

Chiyoda-ku, Tokyo

Key Strengths

  • B2B marketing and sales consulting firm
  • Specialized inside sales outsourcing and consulting capabilities with strong Japan market presence
  • Core expertise: B2B marketing strategy, sales process design

Services

B2B marketing strategysales process designSDR/BDRLead Qualification

Pricing

¥500,000+/month

Best For

Companies seeking specialized inside sales outsourcing and consulting expertise in a focused area

12

M&M Research Institute(エムエム総研)

Shinjuku-ku, Tokyo

Key Strengths

  • B2B marketing research and consulting
  • Focused inside sales outsourcing and consulting capabilities with strong Japan market presence
  • Core expertise: B2B marketing, lead generation, research

Services

B2B marketinglead generationresearchSDR/BDRLead Qualification

Pricing

¥400,000+/month

Best For

Companies wanting focused inside sales outsourcing and consulting services with dedicated support

13

Neo Career Co., Ltd.(ネオキャリア)

Shinjuku-ku, Tokyo

Key Strengths

  • HR tech and recruitment services company
  • Comprehensive inside sales outsourcing and consulting capabilities with strong Japan market presence
  • Core expertise: Recruitment, HR solutions, staffing services

Services

RecruitmentHR solutionsstaffing servicesSDR/BDRLead Qualification

Pricing

¥250,000+/month

Best For

Mid-to-large companies wanting comprehensive inside sales outsourcing and consulting support

5

Comparison Table: All 13 Companies

RankCompanyPricingServicesKey Strength
1Radineer★¥200,000+/month5 servicesMarketing × Inside Sales integration for higher conversion rates
2SALES ROBOTICS¥500,000+/month5 servicesInside sales and sales automation specialist
3CEREBRIX Inc.¥700,000+/month5 servicesSales outsourcing and consulting company
4BeTrade Inc.¥400,000+/month4 servicesLeading inside sales outsourcing and consulting provider in the Japanese market
5SMARTCAMP Inc.¥500,000+/month5 servicesB2B SaaS comparison platform (BOXIL)
6LEAGLE Inc.¥600,000+/month5 servicesInside sales and BDR services company
7Will of Work Inc.¥400,000+/month4 servicesSpecialized inside sales outsourcing and consulting expertise with strong domain knowledge
8sora Project¥300,000+/month4 servicesSpecialized inside sales outsourcing and consulting expertise with strong domain knowledge
9Ambient Navi Inc.¥200,000+/month4 servicesFocused inside sales outsourcing and consulting services with niche market expertise
10Confidence Inc.¥500,000+/month4 servicesFocused inside sales outsourcing and consulting services with niche market expertise
11SAIRU Inc.¥500,000+/month4 servicesB2B marketing and sales consulting firm
12M&M Research Institute¥400,000+/month5 servicesB2B marketing research and consulting
13Neo Career Co., Ltd.¥250,000+/month5 servicesHR tech and recruitment services company
6

Inside Sales Service Pricing Guide

Service ScopePrice RangeNotes
Initial Consultation & Strategy¥100,000 - ¥300,000One-time
Basic Implementation¥200,000 - ¥500,000Project-based
Monthly Management¥200,000 - ¥500,000/monthOngoing optimization
Advanced Analytics¥100,000 - ¥300,000/monthReporting & insights
Full-Service Package¥300,000 - ¥1,000,000/monthAll-inclusive

Radineer Inside Sales Pricing

Radineer offers comprehensive Inside Sales services with competitive pricing. With 10+ years of digital marketing expertise and AI technology integration, we deliver high-value inside sales solutions. Start with a free consultation.

Get Free Consultation
7

Inside Sales Implementation Steps

1

Initial Assessment

Week 1

Comprehensive analysis of your current inside sales status, competitive landscape, and opportunity identification.

2

Strategy Development

Week 2-3

Based on assessment findings, develop a customized inside sales strategy with clear objectives, KPIs, and implementation roadmap.

3

Foundation Setup

Weeks 4-6

Implement core inside sales infrastructure, tools, and processes. Establish tracking and measurement frameworks.

4

Execution & Optimization

Weeks 7-16

Execute inside sales campaigns and initiatives. Continuously optimize based on performance data and market feedback.

5

Review & Scale

Monthly ongoing

Monthly performance reviews, strategy refinement, and scaling of successful initiatives. Regular reporting with actionable insights.

8

Inside Sales Success Stories

Our Results

Radineer: Achieved Significant Inside Sales Results for Japanese Clients

6 months
to key milestones
200+
companies supported
3-5x
average ROI

Through comprehensive inside sales strategy and AI-enhanced implementation, Radineer delivered measurable results for clients across multiple industries in Japan.

B2B Company

+200% improvement in inside sales KPIs

Through strategic inside sales implementation and ongoing optimization, achieved significant improvement in key performance metrics within 6 months.

Enterprise Client

Industry-leading inside sales results

Comprehensive inside sales strategy led to top-tier performance metrics and measurable business impact for an enterprise client.

9

Best Inside Sales Company for Your Specific Needs

Best for SDR/BDR Outsourcing

Dedicated inside sales teams that qualify leads and book meetings for your closers.

SALES ROBOTICSCEREBRIX Inc.

Best for Sales + Marketing Integration

Inside sales connected with marketing automation, SEO, and content for full-funnel optimization.

Radineer (inside sales + SEO + LLMO)

Best for Sales Process Design

Building repeatable inside sales processes with playbooks and KPI frameworks.

RadineerCEREBRIX Inc.

Best for Tech/SaaS Inside Sales

Specialized inside sales for technology and SaaS companies with complex sales cycles.

SALES ROBOTICSRadineer

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10

Frequently Asked Questions

How much does Inside Sales cost in Japan?
Inside Sales services in Japan typically cost ¥150,000-1,000,000/month. Pricing varies based on project scope, company size, and service depth. Radineer offers Inside Sales services starting from ¥200,000+/month, which includes comprehensive strategy, implementation, and reporting. Enterprise-grade solutions from larger firms may cost significantly more. Always compare what's included in the base price before making a decision.
How long does it take to see results from Inside Sales?
Inside Sales typically takes 1-3 months to show measurable results. Initial improvements may be visible within the first month as baseline optimizations take effect. For comprehensive inside sales outsourcing and consulting programs, plan for a 6-12 month engagement to achieve full ROI. Radineer provides monthly progress reports so you can track improvements from day one.
How should I choose a Inside Sales company in Japan?
Key criteria for selecting a Inside Sales provider include: (1) Track record with specific case studies and metrics, (2) Service scope covering all aspects of inside sales outsourcing and consulting, (3) AI and technology capabilities for 2026 and beyond, (4) Transparent reporting and communication, and (5) Cost-effectiveness relative to included services. Radineer scores highly on all five criteria, combining inside sales outsourcing and consulting with AI-powered optimization.
Can we handle Inside Sales in-house?
Basic inside sales outsourcing and consulting tasks can be handled in-house with the right training. However, advanced Inside Sales requires specialized expertise, tools, and continuous optimization that most companies lack internally. A hybrid approach—outsourcing strategy and complex tasks while building internal capabilities—often delivers the best results. Radineer offers training programs to help build your team's Inside Sales skills alongside managed services.
What is the difference between Inside Sales and CRM?
Inside Sales focuses on inside sales outsourcing and consulting, while CRM addresses a related but distinct area. While both contribute to digital marketing success, they require different strategies and expertise. The most effective approach combines both—which is why Radineer offers integrated services covering Inside Sales and CRM together, ensuring consistent strategy across all channels.
What happens if Inside Sales doesn't deliver expected results?
Reputable Inside Sales providers focus on transparent reporting and iterative optimization rather than guaranteeing specific outcomes. Key protections include: monthly performance reports with clear KPIs, regular strategy reviews and adjustments, and flexible contract terms. Radineer provides detailed monthly reports and continuously optimizes based on data. We recommend starting with a 3-month trial to evaluate fit before committing to longer engagements.
What technology and tools are used in Inside Sales?
Modern Inside Sales leverages a combination of specialized tools and AI-powered analytics. Key technologies include analytics platforms, automation tools, and AI/ML solutions for optimization. In 2026, generative AI tools like ChatGPT and Claude are increasingly integrated into inside sales outsourcing and consulting workflows. Radineer combines proprietary AI analytics with industry-standard tools to deliver data-driven Inside Sales results.
What are the Inside Sales trends for 2026?
Key Inside Sales trends for 2026 include: (1) AI integration becoming standard across all inside sales outsourcing and consulting workflows, (2) Increased importance of data privacy and first-party data, (3) Growing emphasis on AI search optimization (LLMO), (4) More sophisticated automation and personalization, and (5) Greater focus on measurable ROI and attribution. Radineer stays ahead of these trends by continuously investing in AI capabilities and methodology innovation.
Can Inside Sales services be provided remotely?
Yes, Inside Sales services can be delivered entirely remotely. All strategy meetings, reporting, and project management are conducted via video conferencing and collaboration tools. This means companies anywhere in Japan (or internationally) can work with top Tokyo-based Inside Sales providers like Radineer without geographic limitations. We support clients across Japan and have international clients as well.
How does Inside Sales integrate with other marketing activities?
Inside Sales works best as part of an integrated digital marketing strategy. It connects naturally with CRM, content marketing, and other channels to create a cohesive customer journey. Radineer's key differentiator is our integrated approach—we design Inside Sales strategies that complement your SEO, content, and AI search optimization efforts, maximizing overall marketing ROI.
What is the typical contract duration for Inside Sales services?
Most Inside Sales engagements in Japan run 6-12 months, as inside sales outsourcing and consulting requires time to build momentum and show results. Some providers require 12-month minimums, while others offer flexible month-to-month options. Radineer offers a 3-month starter plan for companies wanting to evaluate effectiveness before committing to a longer engagement, plus standard 6-month and 12-month plans.
Is Inside Sales suitable for small and medium businesses?
Absolutely. While enterprise companies have larger budgets, SMBs often see proportionally higher ROI from Inside Sales because they're competing for visibility in specific niches. Radineer specifically designed our Inside Sales pricing (from ¥200,000+/month) to be accessible to growing businesses. The key is finding a provider that understands SMB constraints and can deliver focused, high-impact inside sales outsourcing and consulting within your budget.
11

Glossary

SDR/BDR
Sales Development Representative / Business Development Representative — roles focused on prospecting and qualifying leads for the sales team.
Lead Scoring
A methodology for ranking prospects based on their perceived value and likelihood to convert, typically using behavioral and demographic data.
ABM
Account-Based Marketing — a B2B strategy that focuses marketing and sales resources on a defined set of target accounts.
Sales Funnel
The stages a prospect goes through from initial awareness to final purchase, typically: awareness → interest → consideration → decision.
MQL/SQL
Marketing Qualified Lead / Sales Qualified Lead — leads that have been vetted by marketing (MQL) or sales (SQL) as ready for the next stage.
SFA
Sales Force Automation — technology that automates sales processes including contact management, pipeline tracking, and forecasting.
Pipeline
A visual representation of where prospects are in the sales process, showing the total value and number of deals at each stage.
Intent Data
Data signals indicating a prospect's buying intent, derived from online behavior like content consumption and search activity.
12

Summary

Key Takeaways

  • Inside Sales is essential for business competitiveness in the Japanese market
  • Choose based on: track record, service scope, technology, reporting, and cost-effectiveness
  • Pricing varies widely — focus on ROI rather than lowest cost
  • AI integration and LLMO readiness are increasingly important differentiators

Ready to Start Your Inside Sales Strategy?

With 10+ years of digital marketing expertise and cutting-edge AI technology, Radineer provides comprehensive Inside Sales support. Start with a free consultation to assess your current situation.

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Japanese Version: Inside Salesサービス比較Radineer Inside Sales Service DetailsLLMO Service Comparison (English)SEO Service Comparison (English)

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