Karla Barker 
A new Bank of Japan lecture adds a missing step to the warning that Japan could help set off Bitcoin’s next selloff. The point is not that Japan’s overseas income is irrelevant. It is that earning money abroad does not mean the cash must come home and get converted into yen.
What Ueda’s Lecture Changes
Bank of Japan Gov. Kazuo Ueda delivered the International Monetary Fund lecture on November 6, 2026, and the BOJ published it the next day. He drew a line between income earned by overseas affiliates and the decision to bring that cash back to Japan. Since 2012, outward foreign direct investment has overtaken portfolio investment as Japan’s main capital-outflow route, Ueda said.
That matters because retained affiliate profits can support Japan’s primary income surplus while also being recorded as fresh direct investment abroad. The same accounting process can make both the income surplus and outward investment look larger without requiring the money to return home first. So a headline about Japan’s income surplus, by itself, does not prove yen buying or Bitcoin selling pressure.
Why the Data Matters
The latest weekly evidence also argues against a simple foreign-asset liquidation story. Japan’s Ministry of Finance reported on November 6 that designated Japanese reporting institutions were net buyers of foreign long-term debt and foreign equity and investment-fund shares during October 25 to 31.
Two near-term checks are due. The ministry’s schedule lists October’s monthly securities transactions for November 10 and weekly transactions for November 1 to 7 on November 12, both at 8:50 a.m. Japan time. The schedule can change, and as of November 9 those results were still ahead.
Those releases may show whether reported foreign-security purchases or sales persist. Their scope is limited. The ministry’s methodology covers designated major institutions, excludes direct investment and reserve assets, and does not capture every portfolio transaction. A run of net disposals would be evidence about securities allocation. It would not, on its own, show that the proceeds were converted into yen.
Carry Trades Are a Different Channel
A yen carry trade is a financing position, not the same thing as a company keeping profits in an overseas subsidiary. Investors borrow a lower-yielding currency to buy higher-yielding assets in other currencies, sometimes through derivatives. In an August 2024 analysis, BIS researchers described how debt reduction and higher margin requirements appeared to amplify market stress, with yen-funded positions particularly exposed.
A stronger yen can make an unhedged yen borrowing position more costly to repay. Higher margins can force investors to find cash or cut exposure. The researchers said crypto losses in that episode suggested retail margin calls and possible forced closures of unrelated positions. That is a possible transmission channel, not proof of forced Bitcoin selling now.
For Bitcoin, the useful distinction is between a slow allocation shift and a fast financing unwind. Persistent foreign-security disposals would support the first. Sharper yen moves with funding and margin stress would matter more for the second.