What Byside does

Byside株式会社 (Byside Co., Ltd.) is a Tokyo-based M&A advisory firm founded on July 22, 2022, that operates a buyer-exclusive Financial Advisor (FA) model distinct from traditional sell-side intermediaries in Japan. The firm exclusively represents acquirer interests, building a sourcing pipeline from a partnership network of 500+ M&A intermediary and FA companies that collectively feed over 1,000 deal opportunities per year. Byside's primary customer segments are mid-market and enterprise Japanese companies pursuing growth through acquisition (including those targeting ¥10B–¥100B revenue scale), alongside SME owners seeking business transfer or succession solutions and partner M&A operators seeking qualified buyers for their sell-side mandates.

The company's core product is "Byside FA," an end-to-end advisory service comprising five integrated modules: growth strategy formulation, deal sourcing and matching (combining human curation with an AI recommendation engine), due diligence (DD), negotiation and execution support, and post-merger integration (PMI), with additional support for institutional mechanisms such as SME business restructuring investment loss reserves and tax incentive programs. The firm leverages an AI matching system that processes structured buyer profiles against incoming deal flow, layered on top of human advisor expertise drawn from alumni of Keyence, Japan M&A Center, and Rakuten. Notable named engagements include Clip Holdings (real estate/remodeling), a Kanagawa-based waste paper wholesaler, and a Tokyo-listed apparel manufacturer.

Byside's revenue model is purely transactional: no initial fees, no monthly fees, with consultation provided free of charge; an intermediate fee equal to 20% of the estimated transaction fee (minimum ¥5M) is charged at basic agreement signing, and the final transaction fee is a tiered percentage of acquisition consideration (5% on the ¥200M–¥1B portion down to 1% on the ¥10B+ portion), subject to ¥20M–¥30M minimum floors based on book-value total assets. The firm distributes services through direct enterprise sales led by its in-house advisory team and through the partner operator channel, and is a registered M&A support organization under the METI/Small and Medium Enterprise Agency system in compliance with the SME M&A Guidelines (3rd Edition).

Name

Byside

Legal name

Byside株式会社

Website

https://byside.co.jp

Company type

Private

Founded year

2022

Operating status

Operating

Headcount range

11–50 employees

Short description

Byside株式会社 is a Tokyo-based buyer-exclusive M&A financial advisory firm founded in 2022 that helps mid-market and enterprise Japanese companies grow via strategic acquisitions, drawing deal flow from a 500+ M&A operator partner network and offering end-to-end support from strategy through post-merger integration on a pure transaction-fee basis.

Ownership category

akta.pro rank

Product category

M&A Advisory Services

NAICS

Management Consulting Services (54161)

SIC

Services-Management Consulting Services (8742)

akta.pro primary industry

M&A Advisory (Buy-Side & Sell-Side) (BPAHAOAA)

akta.pro secondary industries

Buy-Side M&A Advisory (FSAEAGAB), Buy-Side Search & Acquisition Advisory (FSAEAIAD)

Keywords

• Buy-side M&A advisory
• Corporate acquisition support
• Due diligence services
• PMI consulting
• Target sourcing advisory

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

Revenue model

1. M&A Advisory Transaction Fees: Byside charges transaction fees upon deal close, calculated based on the acquisition consideration amount using a tiered fee schedule. They also charge an intermediate fee (20% of estimated transaction fee, minimum ¥5M) at the point of basic agreement signing. No initial fees or monthly fees are charged.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Byside is a Tokyo-based M&A advisory firm that exclusively represents acquirers (the buy-side) in corporate transactions. The firm provides end-to-end support across the M&A lifecycle including target sourcing, negotiation, due diligence, and post-merger integration (PMI), serving Japanese companies pursuing growth through acquisitions. Its service is differentiated by a large partner network used for deal origination combined with AI-assisted target matching.

Product overview

Byside operates as a buyer-focused M&A advisory firm offering a unified service called 'Byside FA'. The core product is an end-to-end buyer-exclusive FA service comprising five integrated modules: strategy formulation, deal sourcing and AI-powered matching, due diligence (DD), negotiation and closing support, and post-merger integration (PMI). Unlike traditional intermediaries that serve both sellers and buyers, Byside FA exclusively represents buyer companies, providing a differentiated full-package model that includes DD and institutional support services as standard inclusions.

Differentiator

Problem solved

Functional benefit

Products and services

• Buy-side M&A Advisory End-to-end M&A advisory service for Japanese corporate acquirers, covering target sourcing, valuation, negotiation, due diligence, and post-merger integration.
• Target Sourcing Identification and shortlisting of acquisition candidates for Japanese buyers using AI-based matching and Byside's partner network.
• M&A Negotiation Support Representation and advisory for buyers during price and terms negotiation with sellers and their intermediaries.
• Due Diligence Comprehensive due diligence coordination and analysis on behalf of the acquirer covering financial, commercial, and operational dimensions of the target.
• Post-Merger Integration (PMI) Support Advisory support for acquirers after deal closing to integrate operations, systems, and culture of the acquired entity.
• Free M&A Consultation No-cost initial advisory consultation for prospective Japanese acquirers evaluating a transaction.

Quantifiable outcome

• Minimum deal cycle time of 1.5 months from initial consultation to M&A closing
• +3 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability2 records

Partnerships

One partnership is on record.

• 500+ M&A Operator Network (M&A仲介・FA業者)coreChannel Partner/ Reseller/ DistributorByside has established business partnerships with over 500 M&A intermediary and FA companies across Japan. These partners introduce their sell-side mandates to Byside, which then matches them with pre-qualified acquirer clients from its own network. This partnership network is the core sourcing mechanism enabling Byside to receive 1,000+ deal opportunities annually and serve as a market-wide 'hub' for M&A deal flow.

Scale indicators5 records

Recent moves9 records

Expansion highlights5 records

Broad incumbents

• Houlihan Lokey: Global investment bank with strong M&A advisory practice, including Japan coverage. While focused on larger mid-market and upper-mid-market deals, it represents the international advisory alternative Byside could face when Japanese buyer companies pursue cross-border acquisitions.
• Yamada Consulting Group: Long-established Japan-focused business consulting and M&A advisory firm serving SMEs and mid-market companies. Comparable customer base and deal size, with broader consulting scope beyond pure M&A.
• Japan M&A Center: Japan's largest dedicated M&A intermediary, with thousands of advisors and a nationwide SME-focused intermediary network. While traditionally sell-side-leaning, it represents the dominant incumbent Byside competes against for buyer mind-share; multiple Byside senior advisors are alumni of this firm.
• Deloitte Japan (M&A Advisory): Big Four professional services firm with a substantial M&A advisory practice in Japan serving mid-market and large-cap deals. Represents the broader professional services alternative Byside competes against for sophisticated buyer-side mandates requiring DD and PMI support.

Direct peers

• M&A Capital Partners: Japan-focused M&A intermediary providing both buy-side and sell-side advisory with a national advisor network. Comparable in business model and target market (mid-market Japanese M&A), and competes directly with Byside for buyer-side mandates on similar-size deals.
• Nihon M&A Advisors: Mid-market M&A advisory firm serving Japanese SMEs and mid-sized companies on both buy- and sell-side mandates. Direct competitor with overlapping target customer segments and a similar intermediary-network-based sourcing model.
• RECOF (M&A Advisors): Established Japan M&A intermediary serving mid-market and SME transactions with a long operating history. Comparable advisory services and customer profile, with comparable transaction-fee revenue model.
• M&A Roic: Japan-based M&A intermediary focused on SME succession and mid-market deals. Directly comparable in service scope and target buyer/seller segments, operating as a peer intermediary firm.

Regional players

• Atreides Capital Partners: Japan-focused cross-border M&A advisory firm with bilingual execution capability. Comparable buyer-side advisory services, though primarily focused on inbound/outbound cross-border transactions rather than pure domestic Japan M&A.

Emerging players

• Stripe Partners (Japan advisory): Independent Japan-focused M&A and corporate finance advisory firm serving mid-market transactions. Comparable in size and target customer segments to Byside, and an emerging competitor for buyer-side mandates.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@Byside-channel.

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Byside