Reporting when you trade on overseas exchanges
- Author
- CRYPTO PORT Editorial
- Published
- Updated
- Reading time
- 7 min
In short
For a Japanese resident, income is in principle reportable regardless of where the venue is located. Overseas exchanges rarely issue a Japanese-style annual statement, so keeping your own records matters far more. Check National Tax Agency guidance and consult a tax professional.
Key points
- A resident's income is in principle reportable even when the venue is abroad
- No Japanese annual statement is usually provided — you gather CSVs yourself
- Records denominated in foreign currency or stablecoins must be converted to yen
- Account freezes and service shutdowns can put your history out of reach
Definition
The reporting practice for a Japanese resident who trades on a crypto exchange located outside Japan, where assembling documentation falls on the user.
The starting principle is clear: for a Japanese resident, income is in principle reportable regardless of where it arose. 'It is an overseas exchange, so Japan is not involved' is simply wrong, and the framework on this point is not ambiguous.
What differs in practice is documentation. Japanese exchanges issue an annual statement summarising the year; overseas venues almost never produce anything in a Japanese format. Plan on exporting transaction CSVs and organising them yourself.
That brings the conversion work. Overseas records are usually denominated in US dollars or stablecoins and cannot be used as they are. You need to settle on which moment and which source supplies the rate, apply it consistently, and be able to explain it. Converting different trades on different bases leaves you unable to show coherence.
A real risk is losing access to the history. Overseas exchanges suspend service to Japanese residents when regulation changes, freeze accounts, or close entirely — and then the past history is no longer downloadable. Waiting until a filing deadline to fetch it can be too late, so export periodically during the year.
Note also that holding assets or accounts abroad can, depending on circumstances, bring additional filing obligations beyond the return itself. Which procedures apply varies, so if you use overseas exchanges regularly, raise it with a tax professional.
Watch out for
- · This page is a general orientation, not tax advice
- · 'Overseas exchange means nothing to report' is incorrect
- · Which procedures apply varies — check National Tax Agency guidance and consult a tax professional
Frequently asked questions
I can no longer export my overseas exchange history. What now?
Gather whatever remains — deposit and withdrawal records, screenshots, email notifications — then document how far you were able to reconstruct and take it to a tax professional. Do not process incomplete records on your own judgement.