March 4, 2026· Updated May 14, 2026
By the HalfKey team
When to book a Tokyo midterm: lead time by season
Your Tokyo midterm arrival month decides how early to book. October and November are the hardest because Japanese second-half-year transfers and nice-weather walk-ins hit the same eight weeks. Summer and winter are easier. Here's the calendar.
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You're booking a Tokyo midterm apartment, and you're wondering how early to start. The honest answer: depends on when you're arriving. Lead time isn't constant across the year. Two patterns push it around. Japanese fiscal-year transitions on April 1 and October 1. And walk-ins who pick the nice months based on a tourist trip. Sometimes the two stack. October 1 is the worst day on the Tokyo midterm calendar because of it.
I'm not a corporate-relo broker. I've been to Japan eight times. I lived in Shimokitazawa for 90 days once. I've watched friends book midterm stays in every month of the year. The friend who booked her August stay had a much easier search than the friend who tried for October. The pattern below is what I'd give you for your month.
The two patterns that drive lead times
Japanese companies run an April-to-March fiscal year. Most of them do two hiring and transfer waves. One starts April 1 for the main fiscal year. One starts October 1 for the second half (下期, shimoki — the second half of the fiscal year). When a company moves an employee to Tokyo, they put them in a short-term furnished apartment for 60 to 90 days. The employee uses that time to look for somewhere permanent. These short-term apartments cluster in Minato, Chiyoda, and Chuo wards, near corporate headquarters. They get booked several weeks in advance.
The other pattern is walk-ins. Nomads, contractors, sabbatical-takers, language-school students, semester-abroad researchers. People who pick their own dates also bunch around predictable months. Spring for cherry blossom. October for mild weather and momiji (autumn leaves). October especially, because a one-week tourist trip in October is what most people remember.
Each pattern on its own is fine. Both stacking is what leaves you with fewer apartments to pick from.
Spring arrival (March–April): book 6–8 weeks ahead
The April 1 fiscal-year start brings the biggest corporate transfer wave of the year. Cherry blossom season runs late March through early April and pulls walk-ins onto the same calendar. The two stack from mid-March through mid-April. Central wards (Minato, Chiyoda, Chuo) fill up first.
If you can shift your arrival to late April or early May, you're past the worst of it. Cherry blossom is also done by then, so one of the two factors pushing demand is gone.
Summer arrival (May–August): book 4–6 weeks ahead
The corporate transfer waves are done. Walk-ins thin out because of Tokyo's humidity from late June onward. August is the easiest month of the year to find a furnished apartment. The cost is that you're arriving in August. The humidity is real. If you can handle it, August is the easiest month to book.
October–November arrival: book 8–10 weeks ahead
This is the worst stretch on the calendar. The October 1 second-half transfer wave and the nice-weather walk-ins hit the same eight weeks. Central wards take it the hardest because that's where the short-term corporate apartments are. By November, residential wards like Setagaya, Bunkyō, and Suginami also fill up as walk-ins widen their searches outward.
If your arrival is October 15, don't wait until September to start looking. Email three operators by mid-August at the latest. Send your exact dates, your ward shortlist (no more than four wards), and your budget ceiling. Ask each one for two unit suggestions, with floor and orientation in writing. The operators who can answer in two business days are the ones planning ahead for the October crunch.
If your arrival is November 1, you have one extra week of breathing room. No more. The corporate transfer bookings from October 1 run through the end of November. If the wards you want are Minato, Chiyoda, or Chuo, widen to Shinjuku, Bunkyō, or Meguro by early September. Not later.
If your arrival is flexible by a week or two, late August is one of the easier in-between weeks. You take a couple of weeks of humidity. You skip the October crunch entirely. The same kind of apartment costs less and you have more to pick from.
Winter arrival (December–February): book 3–5 weeks ahead
This is the easiest stretch. No fiscal-year transition. Walk-ins thin out because of the cold and the New Year holidays. January is loose. February is loose. The cost is that you're arriving in Tokyo's coldest months. If you've never been in Tokyo in January, check the heating setup with the operator before you commit. Some older buildings are hard to heat.
If I were booking from scratch
Find your arrival month above. Add the recommended lead time. Book by that date, not later. If your work or visa lets you slide your arrival by a couple of weeks, look at the in-between weeks. Late August. Mid-November. Both are easier than the peaks they sit next to.
The big mistake on a Tokyo midterm is treating the booking calendar as uniform when it isn't. October 1 is not just any day. Plan for it before you arrive in it.
— HalfKey runs furnished Tokyo apartments for stays of 30 days to 12 months. Browse listings for your dates.