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The hour after the Tokyo lunch break

Tokyo's lunch break gets very little attention on English language trading forums, but it shapes the Asian session more than people realise. The Tokyo cash equity market stops for about an hour around midday, and when it reopens, there's often a burst of activity in JPY pairs.

During the break itself, USDJPY and the crosses tend to quiet down. Ranges tighten, the spread can widen slightly, and moves fade. Then when the afternoon session opens, Japanese traders and funds return, and the yen pairs often pick a direction for the rest of the Asian session.

I've started treating the post lunch reopen like a mini session open. I mark the high and low of the lunch hour and watch for a break of it once trading resumes. A clean break with follow through often runs until the Asian session winds down and Europe starts arriving. A failed break that comes back into the lunch range usually leaves the pair chopping for the rest of the afternoon.

It doesn't happen every day. On days with big morning news, the lunch hour isn't quiet enough to form a useful range. And on days when the morning already trended hard, the afternoon may just continue without any clear signal.

Still, for anyone trading the Asian session regularly, the lunch break is a natural point to reset and make a fresh plan.

Check the exact times against your platform clock. The Tokyo lunch break runs on Japan time, and Japan doesn't observe daylight saving. So the break shifts by an hour in your local or server time twice a year if your location or broker changes clocks. Marking it with a fixed time on the chart gets it wrong half the year. I use a session indicator set to Tokyo time so it stays aligned. Most charting platforms let you set custom session boxes with a time zone. Use Tokyo time for this one and the box will always line up with the actual break. A plain vertical line at a fixed server time is the easiest way to get it wrong. Daylight saving changes in Europe and the US are the usual time this goes wrong, so check it in March and October.

AUDJPY and NZDJPY often react more cleanly to the reopen than USDJPY, partly because Australian and New Zealand traders are still active at that point. If the yen gets bought at the reopen, the crosses can drop more because the AUD and NZD side is also sold. Wider spreads apply, but the move is often bigger, so the cost relative to the move is not that different. Australia's own afternoon is underway at that point and local data or RBA headlines can still move AUD, which can drown out the yen reaction. Checking the calendar for AUD and NZD releases near the Tokyo reopen helps decide which cross is actually reacting to the yen.

Chinese markets also matter at this time. Their lunch break overlaps differently, and the CNY fixing in the morning can set the tone for Asian FX. If something happened with the yuan fixing, that can affect how the yen pairs behave after Tokyo lunch. I don't track it closely, but I note any unusual fixing headlines before deciding how much weight to give the afternoon reopen. Headlines about the yuan fixing are easy to find on news feeds early in the Asian day. If the fixing was far from expectations, Asian FX can be jumpy all morning and the lunch break range may not be a clean one to trade from.

For traders in Europe this is early morning, often before work or before the London open. It's a decent window to practise if you have limited time, because the setup is simple and the timing is fixed. Keep it modest, though. Asian session liquidity is thinner than London, and a large position in a post lunch break can fill noticeably worse than you'd expect. Size down compared with London and keep targets realistic for the session's average range. The Asian afternoon can trend, but it often runs out of steam well before Europe arrives, and late entries tend to get stuck.

Glad to see the lunch break getting attention. Since November 2024 the Tokyo Stock Exchange also closes at 15:30 instead of 15:00, so the afternoon session runs half an hour longer than older guides say. A useful way to treat the lunch hour is as a mini Asian range inside the session. Whether a break of that range shortly after 12:30 Tokyo sets the direction until Europe arrives is easy to test yourself: mark the 11:30 to 12:30 high and low on USDJPY and AUDJPY for a month and note which side breaks first and whether it holds until 15:30. On days with no direction by 13:30, I mostly stop trading the yen pairs and wait for London instead.