Tender Offers (TOB) in Japan: How They Work and What to Check

A TOB (take-over bid, 株式公開買付, also called a tender offer) is a way of buying shares from shareholders outside the exchange's ordinary trading. The bidder announces the price, the number of shares sought and the offer period in advance and files a tender offer statement on EDINET. Every shareholder who tenders is offered the same price.

Tender offers are used in friendly takeovers, management buyouts (MBOs), changes of control, the unwinding of parent-subsidiary listings and going-private transactions. They are among the largest share price events in the market.

To protect ordinary shareholders, Japan's Financial Instruments and Exchange Act requires a tender offer for certain acquisitions of listed company shares, so that a change of control cannot happen quietly through a few private deals. Amendments that took effect on May 1, 2026 changed these rules. According to law firm summaries:

• The main trigger for a mandatory tender offer was lowered from one-third to 30%: acquisitions that would take the buyer above 30% generally require a tender offer.
• Ordinary on-market purchases, which were previously outside the rule, now fall within its scope.
• The older trigger remains for off-market acquisitions from more than ten shareholders within 60 days that take the buyer above 5%.
• The earlier "rapid buy-up" rule was abolished.

1. Announcement. The bidder announces the offer and files a tender offer statement on EDINET.
2. The target's position statement. Within 10 business days, the target company files a report stating its opinion: in favor, neutral or opposed.
3. Offer period. Generally 20 to 60 business days.
4. Tendering and purchase. Shareholders tender their shares and the bidder buys them.
5. Result report. After the period ends, the bidder reports how many shares were tendered and bought.

During the offer period the bidder generally cannot lower the price, although it can raise it, and tendering shareholders can generally withdraw.

A bidder usually offers a premium over the recent share price, expressed against the closing price the day before the announcement and against one-, three- and six-month averages. The premium is stated in the target's position statement and often in the valuation report from the third-party adviser. Premiums for friendly deals are frequently in the tens of percent and can be higher in contested situations, but they vary widely from deal to deal.

After an announcement the share price typically moves close to the offer price. A small gap usually remains, reflecting the uncertainty of completion and the possibility of a higher counter-bid.

• Friendly TOB. The bidder and the target's management agree beforehand, and the target usually announces support.
• Hostile (unsolicited) TOB. Launched without management's consent. The target may oppose it and look for alternatives or defenses. Historically rare in Japan, these have become more common in recent years.
• Counter-offer. A rival bidder tops an offer already under way, which can start a price contest.
• MBO (management buyout). Management, usually with a fund, buys the company and takes it private. MBOs carry a built-in conflict of interest, since management wants a low price and shareholders want a high one, so the fairness of the price is always a question.
• Self-tender. A company tenders for its own shares, sometimes at a discount to the market.

The target's position statement is often the most informative document, because it explains whether the board supports the offer and why. It commonly attaches a valuation by a third-party adviser and, in MBO cases, the opinion of an independent committee. Valuations typically show ranges from a discounted cash flow analysis, a market price method and a comparable company method, which lets you see where the offer price sits within them.

For MBOs, the points that are usually examined include whether a special committee of independent directors negotiated the price, whether the share price had been depressed in the months before the announcement and whether the discounted cash flow assumptions look too conservative. Japan's Ministry of Economy, Trade and Industry has issued guidelines on fair M&A practices that address these issues.

• Tender the shares and lock in the offer price.
• Hold and remain a minority shareholder. In a take-private, liquidity can fall sharply after the offer.
• Sell in the market, usually at a price slightly below the offer price, to get cash straight away.

In a take-private, the offer is typically followed by a squeeze-out, often through a share consolidation, in which the remaining shareholders are cashed out, generally at the same price as the offer. Factors to weigh include the chance of a higher bid, how the price compares with the company's intrinsic value and your own liquidity needs. This is general information and not advice.

KabuNew collects tender offer announcements and filings from TDnet and EDINET and, for the stocks you follow, sends an English summary covering the bidder, the price, the offer period and the target's position. AI summaries can contain errors, so check the original filings before you act. Nothing here is investment advice.