J1 League transfer window 2027: dates and deadline
The J1 League registration period for the 2027 winter market opens on 01 February 2027 and closes at 3 Mar 2027, 23:59 JST. Below is the countdown, the summer reference and what the deadline actually decides.
Winter window
| Stage | Date and time | Time left |
|---|---|---|
| Opens | 01 February 2027 | — |
| Closes | 3 Mar 2027, 23:59 JST | — |
Set in the J.League registration-window table for 2026/27: 1 February to 3 March. The league names the days, not the hour, so the countdown runs to the end of 3 March in Tokyo.
What this deadline means
The window is a registration period, so the date that matters is the moment the filing system closes, not the moment a fee is agreed. A deal announced after the deadline can only be registered when the next window opens.
J1 League runs its own calendar. Nothing obliges Japan to align its dates with the other leagues in this reference, and the confirmed calendar proves the point: its deadlines run from 31 January to 3 March, and none of them falls at the same hour.
The mid-season period is capped at four weeks by the FIFA regulations, which is why the window is compressed and why the final 48 hours carry a disproportionate share of the deals.
- Opens 01 February 2027 and closes 3 Mar 2027, 23:59 JST
- Registration only: negotiations can start earlier
- Loans count as registrations and follow the same deadline
- Free agents can be signed outside the period under the defined exception
Read the general mechanics in window and contract rules, or compare every league on the transfer window calendar.