Large luggage on the Shinkansen —
only 4 lines in western Japan need a reservation.
Five or six suitcases, a stroller, and souvenirs that keep piling up — the quiet worry for a large family is "Do we need to reserve for the big bags? Can we even bring them on board?" The bottom line: an advance reservation for oversized baggage is only required on the "4 western lines." The Hayabusa to Hakodate/Aomori (Tohoku/Hokkaido Shinkansen) needs no reservation. Check which side your line is on before you leave, and you can avoid both the extra fee and any awkwardness on the day.
For a large family, the Shinkansen often trips people up at "Do we need to reserve for oversized baggage?" This article lays it out clearly with a line-by-line map: the 4 western Japan lines that need an advance reservation, and the 6 eastern and northern lines where you can use the luggage space with no reservation (including the Hayabusa to Hakodate/Aomori).
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How it splitsHow the lines that need a reservation split from those that don't
East/north: no reservation needed (Hayabusa, etc.) Confirmed with official info
The Tohoku, Hokkaido (Hayabusa = Hakodate/Aomori), Akita, Yamagata, Joetsu and Hokuriku Shinkansen have no "seat with oversized-baggage space" system. Just put your big suitcases and stroller in the onboard luggage space. It's the same with a JR Pass.
The 4 west/south lines need a reservation
Only the four lines — Tokaido, Sanyo, Kyushu and West Kyushu — require an advance reservation for a "seat with oversized-baggage space." It's free once reserved, and you can place bags behind your seat and so on.
Strollers and the like are exceptions
Strollers, wheelchairs, musical instruments and sports equipment need no reservation and are free, regardless of size. Even on the 4 western Japan lines they don't count as "oversized baggage." Reassuring when you're traveling with little ones.
Only the 4 western Japan lines need an advance reservation.
On every other line, you can just bring your bags on board.
Oversized-baggage reservation by line (quick chart)
"Oversized baggage" means three sides totaling over 160cm and up to 250cm. Find your line by its destination.
| Shinkansen (main destinations) | Advance reservation | Fee / rules |
|---|---|---|
| Tohoku/Hokkaido (Hayabusa = Hakodate/Aomori) | ❌ Not needed | Just bring it on board |
| Akita / Yamagata / Joetsu / Hokuriku (Asama, etc.) | ❌ Not needed | Just bring it on board |
| Tokaido (Tokyo–Shin-Osaka) | ⭕ Required | Free with a reservation (¥1,000 without, June 2026 approx.) |
| Sanyo (Shin-Osaka–Hakata) | ⭕ Required | Free with a reservation (¥1,000 without, June 2026 approx.) |
| Kyushu (Hakata–Kagoshima-Chuo) | ⭕ Required | Free with a reservation (¥1,000 without, June 2026 approx.) |
| West Kyushu (Takeo-Onsen–Nagasaki) | ⭕ Required | Free with a reservation (¥1,000 without, June 2026 approx.) |
*As of 2026-07-02. Fees, categories and coverage may be revised. Please check the latest with official JR info. Strollers, wheelchairs, musical instruments and sports equipment need no reservation and are free, regardless of size.
Figure it outA decision chart based on your destination
When in doubt, judge by your destination. Lines heading east/north from Tokyo need no reservation; the 4 lines heading west/south from Tokyo or Shin-Osaka do.
Shinkansen heading east/north from Tokyo (Sendai, Aomori, Hakodate, Niigata, Kanazawa, Akita, Yamagata) need no reservation for oversized baggage. The 4 lines heading west/south from Tokyo or Shin-Osaka (Kyoto, Osaka, Hiroshima, Hakata, Nagasaki, Kagoshima) do. Fees and categories may be revised, so please check the latest with official JR info.
The two pitfalls (size and fee)
The rules themselves are simple, but two things — "bags that are too big" and "forgetting to reserve on the 4 western lines" — are worth sorting out in advance.
On these lines, no luggage reservation is needed
The Hayabusa to Hakodate/Aomori and the Asama toward Karuizawa need no reservation for oversized baggage. Read alongside your large family's travel plan for peace of mind.
Both are lines that need no advance reservation for oversized baggage (onboard racks are first-come, so board early).
Worries to settle before you leave
I'm not sure which side my Shinkansen is on
Judge by your destination. From Tokyo, east/north (Sendai, Aomori, Hakodate, Niigata, Kanazawa, Akita, Yamagata) needs no reservation. From Tokyo or Shin-Osaka, west/south (Kyoto, Osaka, Hiroshima, Hakata, Nagasaki, Kagoshima) needs one. If in doubt, check the "oversized baggage" note on your booking site too.
Do strollers or bulky kids' gear need a reservation?
No. Strollers, wheelchairs, musical instruments and sports equipment need no reservation and are free, regardless of size (the same on the 4 western lines).
What if I forget to reserve on a line that requires it?
You can still board, but it may cost ¥1,000 per item (June 2026 approx.). An advance reservation is the safe, free option.
I'm worried my suitcase is too big
Judge size by the total of the three sides (width + depth + height). Up to 160cm is not oversized and needs no reservation on any line (the 158cm of international check-in falls here). Over 160cm and up to 250cm is "oversized," which needs a reservation on the 4 western lines only. Over 250cm can't be brought on any Shinkansen, so use delivery. Please check the latest with official JR info.
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📍 This article is part of the Hakodate trip plan ・ see the list of helpful articles