Sairu

What Sairu does

Sairu Co., Ltd. (株式会社才流) is a Tokyo-based, privately-held B2B marketing consulting firm that serves large and medium-sized Japanese enterprises. Founded in 2006 (legal entity established 2014), the firm operates from FPG Links KYOBASHI in Chuo-ku, Tokyo, and has supported 260+ companies across 400+ consulting projects as of June 2026, with notable clients including Toyota Motor Corporation, Sumitomo Mitsui Banking Corporation, Hitachi, Mitsui Fudosan, Mitsui O.S.K. Lines, and OMRON. The firm employs 11–50 staff, roughly 90% of whom are former executives, senior managers, or business unit leaders from major Japanese corporations — a talent composition the firm positions as its core differentiator.

Sairu's service portfolio is built around three pillars: BtoB Marketing & Sales Consulting (covering marketing strategy, ABM, partner business strategy, sales enablement, and sales material improvement); New Business Development Consulting (hypothesis validation through PMF achievement, supported by a documented library of 20+ PMF case stories); and the newly launched BtoB Marketing Research Group, a subscription-based membership program starting April 2026. The technology stack is methodology-based rather than a software platform — 1,500+ proprietary methods, downloadable Excel/PowerPoint templates, structured 9-step problem-solving frameworks, and book publications form the intellectual property that consultants deliver to clients.

The business model is professional services revenue: project-based consulting engagements with non-publicly-disclosed pricing, supplemented by annual membership fees for the Research Group. Distribution is a hybrid of direct enterprise field sales (consultations via website inquiries, seminars, and referrals) and inbound content marketing (owned-media knowledge library, YouTube, books, email newsletter, and webinars). The firm operates fully remotely with offices across Japan and Malaysia, and runs an Advisory Board staffed by executives from NTT Docomo Business, PERSOL Holdings, and Misumi Group. No external funding, M&A, or AI platform capabilities are evident in the source material.

Name

Sairu

Legal name

株式会社才流

Website

https://sairu.co.jp

Company type

Private

Founded year

2014

Operating status

Operating

Headcount range

11–50 employees

Short description

Sairu is a Tokyo-based B2B marketing and new business development consulting firm that serves large and medium-sized Japanese enterprises using proprietary methodologies. With 260+ clients supported across 400+ projects and a team drawn from major Japanese corporations, the firm sells project-based consulting and a subscription research group.

Ownership category

akta.pro rank

Product category

B2B Marketing Consulting

NAICS

Marketing Consulting Services (541613)

SIC

Services-Management Consulting Services (8742)

akta.pro primary industry

B2B / Account-Based Marketing (ABM) Strategy Consulting (MPAAAFAM)

Keywords

• B2B marketing consulting
• Sales consulting services
• New business development
• Account-based marketing
• Inside sales consulting

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Consulting Services: Sairu generates revenue through project-based consulting engagements. Services include BtoB marketing strategy development, sales organization consulting, new business development support, and ABM implementation. Projects typically span multiple months with regular client engagement. Pricing is project-based and not publicly disclosed.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels6 records

Core offering

Sairu is a B2B consulting firm that sells project-based consulting engagements in BtoB marketing, corporate/inside sales, and new business development to large and medium-sized Japanese enterprises. Its paid offerings include the BtoB Marketing Research Group annual membership (peer networking, maturity diagnostics, expert consultations) and dedicated consulting practices in BtoB Marketing & Sales and New Business Development (PMF methodology). Supporting revenue comes from published books and a free knowledge library used for inbound lead generation.

Product overview

Sairu is a consulting and research services company offering a portfolio of BtoB marketing, sales, and new business development services. Its core offerings consist of the BtoB Marketing Research Group (a membership-based peer network) and consulting services organized under BtoB Marketing & Sales (encompassing marketing strategy, ABM, sales enablement, partner business strategy, and sales material improvement) and New Business Development Consulting. These are supported by a library of proprietary methods and tools — including template sets for ABM, recruitment KPIs, competitive analysis, and sales problem-solving — as well as published books. The company does not offer a standalone software product but rather consulting engagements, research membership programs, and downloadable methodology resources.

Differentiator

Problem solved

Functional benefit

Brands

• BtoB Marketing Research Group: A membership-based research group for B2B marketing professionals operated by Sairu Co., Ltd., providing closed-environment peer discussions, exclusive surveys on marketing organization benchmarks, maturity diagnostics, and individual expert consultations.

Products and services

• BtoB Marketing Research Group (BtoBマーケティング研究会) A membership-based research association for BtoB marketing professionals at large and medium-sized companies, providing peer discussions, exclusive surveys on marketing organization benchmarks, maturity diagnostics, and expert consultations through six annual in-person meetings held in Tokyo.
• BtoB Marketing & Sales Consulting (BtoBマーケティング＆セールスイネーブルメント) End-to-end project-based consulting covering BtoB marketing strategy development, campaign execution support, and sales enablement for large and medium-sized Japanese enterprises, including customer understanding-based strategy formulation, ABM support, partner business strategy, sales training, and sales material improvement.
• New Business Development Consulting (新規事業開発) Project-based consulting service supporting corporate new business development from idea generation and hypothesis validation to PMF achievement and growth strategy, leveraging Sairu's proprietary PMF methodologies and a case study database of 20+ companies for large Japanese enterprises.
• Published Books (書籍) Authored and co-authored Japanese-language books on BtoB marketing, new business development, inside sales, partner business strategy, and ABM methodology, published through major Japanese publishers and distributed via Amazon as standalone paid products.

Quantifiable outcome

• Supported over 260 companies across 400+ consulting projects as of June 2026

Named customers6 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• NTT Docomo Business (NTTコミュニケーションズ)advisory boardGTM or Marketing Partner · 7 April 2026Mr. Seigo Tomatsu, Director of Integrated Marketing at NTT Docomo Business, appointed to Advisory Board of Sairu's BtoB Marketing Research Association. Brings expertise in ABM, digital marketing, inside sales, and customer success across the NTT Group.

Scale indicators3 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Kaizen Platform Inc. Tokyo-headquartered digital marketing and creative agency providing website optimization, content marketing, and B2B marketing support for Japanese enterprises — comparable consulting/services model and customer base to Sairu.
• Ferret Inc. (ferret One): Japanese B2B marketing platform and consulting firm offering marketing tools plus strategy consulting for SMB and mid-market Japanese companies — closely overlapping Sairu's B2B marketing strategy and sales enablement focus in the Japan market.

Regional players

• Septeni Holdings Co., Ltd. Japan-based digital marketing services group offering advertising, data-driven marketing, and B2B digital marketing support — overlapping with Sairu's digital/online marketing and ABM execution work for Japanese clients.

Broad incumbents

• Bain & Company (Japan): Global strategy firm with a Japan office actively building capabilities in B2B marketing, customer strategy, and new business growth — competes with Sairu for senior marketing and new-business sponsors at large Japanese enterprises.
• McKinsey & Company (Japan): Top-tier global strategy consultancy with a substantial Japan B2B marketing and sales practice serving many of the same blue-chip Japanese corporates (financial services, manufacturing) that Sairu serves — broader portfolio but overlapping in marketing strategy work.
• Accenture (Japan) / Accenture Song: Global consulting giant with a large Japan practice offering end-to-end B2B marketing strategy, ABM, digital transformation, and sales enablement — overlapping with Sairu's offerings but at much larger scale and with broader service breadth.
• Deloitte Digital (Japan): Part of Deloitte's global network in Japan, providing large-enterprise B2B marketing strategy, ABM, customer experience, and digital transformation services — directly competes for the same enterprise CMO buyer as Sairu.

Emerging players

• Miracle Co., Ltd. (マーケティングのミライ): Japanese B2B marketing consulting firm specializing in sales enablement, marketing automation, and inbound marketing — comparable niche focus to Sairu though smaller in scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xtwitter.com/sairu_sairu
• YouTubeyoutube.com/@user-ks6rq6xd5g
• LinkedInlinkedin.com/company/sairu-inc
• Facebookfacebook.com/sairu.inc

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sairu