M&A due diligence in Japan: APPI, FEFTA and running a bilingual data room

Japan has become one of the busier markets for inbound acquisitions. Succession pressure at family-owned companies, governance reforms that push listed groups to sell non-core businesses, and a long run of low interest rates have all brought more targets to foreign buyers. The diligence work is recognizable to anyone who has run a deal in London or New York. The setting is not.

This guide focuses on what changes for the data room. For the general questions any multi-country deal raises, start with our guide to choosing a data room for a cross-border deal. Japan does not yet have its own page in our regions hub, so this article fills that gap for deal teams.

How does an acquisition in Japan usually run?

A private acquisition of a Japanese company typically moves through these stages:

Two habits stand out. Japanese sellers, especially founder-owned companies, often prefer a negotiated sale with one or two buyers rather than a wide auction. And relationships matter: the bank or adviser who introduced the deal frequently stays close to the process, which affects who gets room access.

Listed targets follow different rules. A tender offer under the Financial Instruments and Exchange Act, fairness procedures and disclosure timing all come into play, and access to non-public information is tightly controlled.

What does APPI mean for a due diligence data room?

The Act on the Protection of Personal Information is supervised by the Personal Information Protection Commission. Like most privacy laws, it restricts handing personal data to third parties without consent. It also recognizes that companies change hands: provision of personal data in connection with business succession, such as a merger or business transfer, is treated differently from an ordinary third-party disclosure.

Commission guidance indicates that sharing personal data with a prospective acquirer during due diligence can fall within that business succession treatment, provided the recipient is bound by confidentiality and uses the data only for evaluating the deal. That is helpful, but it is not a licence to upload everything. The safer pattern is the same one we recommend elsewhere: aggregate employee data in early rounds, pseudonymize what must stay granular, and keep named records in a restricted folder for the final buyer.

Cross-border transfer rules add a second layer. If the buyer reviews data from outside Japan, APPI’s rules on providing personal data to a third party in a foreign country apply, and those can require consent, an equivalent-protection arrangement or reliance on a recognized regime. Japan and the EU have mutual adequacy arrangements, which simplifies EU buyers’ position but not everyone else’s.

When does FEFTA prior notification apply?

The Foreign Exchange and Foreign Trade Act requires foreign investors to file a prior notification before acquiring shares in Japanese companies in designated business sectors, which include areas such as defense-related manufacturing, telecommunications, energy, cybersecurity and certain technology fields. For listed companies, the trigger starts at a low shareholding threshold in designated sectors; for unlisted companies, acquiring any shares in a designated-sector company can be enough.

After filing, there is a statutory waiting period, commonly 30 days, which the authorities can shorten for straightforward cases or extend where they need more time. The Ministry of Finance publishes the current rules and sector lists.

For the data room, FEFTA matters in two ways. First, the filing draws on documents from diligence: the target’s business lines, its products and customers in sensitive sectors. Index those so they can be found fast. Second, the waiting period sits between signing and closing, which keeps the room open longer. Our guide to foreign investment screening compares FEFTA with CFIUS, the EU framework and other regimes.

Is merger control a separate filing?

Yes. The Japan Fair Trade Commission reviews acquisitions that meet its turnover thresholds, with a waiting period after notification. Competitor-to-competitor deals also raise the usual gun-jumping concerns: commercially sensitive information, such as customer pricing, should be shared through a clean team. Our glossary entry on clean teams covers the setup.

How should a bilingual data room be organized?

Language is the daily practical problem. Board minutes, employment rules, leases, permits and most contracts will be in Japanese. Some documents carry company seals rather than signatures, and the seal itself is part of the evidence.

A layout that works well:

• Mirror the index. Keep one folder structure with bilingual folder names, for example “03 Contracts / 契約書”, rather than two parallel trees.
• Keep originals controlling. Store the Japanese original as the document of record and add translations as clearly labelled companion files.
• Translate selectively. Full translation of every document is slow and expensive. Translate core documents in full (articles of incorporation, key customer and supplier contracts, financing agreements) and use summaries or machine translation for triage on the rest.
• Check search. Make sure full-text search and OCR handle Japanese text. Upload a scanned Japanese contract during a trial and search for a known phrase.

Our guide to multilingual due diligence goes deeper on translation tiers and controlling language.

How do time zones affect Q&A?

Japan Standard Time is UTC+9 with no daylight saving. That puts Tokyo 14 hours ahead of New York in the northern winter and 13 hours ahead in summer, and 9 or 8 hours ahead of London. In practice there is no shared working day with the US East Coast.

The answer is structure: a Q&A module with categories, named Japanese-speaking experts on the seller side, an approval step and digests timed to each user’s morning. A follow-the-sun buyer team, with someone in Asia, removes a full day from each round.

Which data room features matter most for Japan deals?

Our directory does not track interface languages, which change often, so ask providers directly. All full-featured rooms in our provider directory include Q&A, group permissions and an audit trail; Ellty and Datasite also list AI features that can help reviewers triage Japanese documents, though translations used for decisions should be checked by a person.

How to set up a data room for a Japanese acquisition

1. Agree the language rules

   Decide which documents are translated in full, which get summaries, and that Japanese originals control. Record it in the process letter.

2. Run the APPI check

   With Japanese counsel, map personal data by folder, confirm the basis for disclosure and the position for reviewers outside Japan.

3. Build a bilingual index

   One folder tree with Japanese and English names; translations stored next to their originals.

4. Screen for FEFTA early

   Identify whether the target's business lines fall in designated sectors so the filing can be prepared during diligence.

5. Configure Q&A for a 13 to 14 hour gap

   Set categories, Japanese-speaking experts and approvers, and morning digests for each region.

6. Plan the archive

   Agree retention and the closing archive, including translations, before the room opens.