Coin lockers are a feature of most stations in Japan.
Depending on size and the station, lockers generally run for ¥200-300 JPY per day.
Lockers are of a few different sizes, but aside from very major rail stations (e.g. Tokyo), I think most lockers will not be large enough to accommodate a large roller bag like those used for checked luggage on airlines.
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Here's a website that shows the different coin locker sizes.
The large size (117cm
x 43
cm
x
57cm ) should be able to hold anything an airline will accept as regular checked baggage, but costs 500 yen.
I remember using one of those at Ueno - you'll probably find them only at the major train stations.
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Kyoto, at least does, as described here: JR Kyoto Station .
A Kyoto station map shows several coin lockers, but this document also describes a left-luggage office.
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I took this bag to Japan and stored it in coin lockers at train stations in both Akihabara and Shinjuku (both in Tokyo): 26 inch roller bag (Amazon link).
According to Amazon, this bag is 26 inches tall, 11 inches long, and 15 inches wide.
(66cm x 28cm x 35cm).
I took a picture of it in a "large" sized locker.
This one was at the Shinjuku station, but the ones at Akihabara were the same size.
I would have had room to put a smallish duffle bag on top of it, and there was also room left over on the side, but (it may be hard to tell from this picture)
had my bag been packed any fuller and therefore had been even an inch fatter
, I don't think it would have fit.
This bag was too large to be used as carry-on luggage on my flight and had to be checked, but it did fit (snugly) into the locker.
The large locker in Shinjuku was 500 yen for 12 hours.
The one in Akihabara was (if I remember correctly) 800 yen for 24 hours.
You need 100 yen coins to use these lockers, so I made sure to save them when I received them as change (although I'm sure you could stop somewhere and ask for change).
Insert your luggage, insert your coins, close the locker, and take your key.
I assume you would have to insert more coins to free your locker if you stay over the allotted time, but I didn't test that theory!
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As stated, the lockers are often too small for big bags, but most major train stations have manned counters that can accept luggage of any shape or size.
Ask around for nimotsu-azukari-dokoro (手荷物預かり所) or look for a "bag-with-key" icon on signs (not to confused with "bag-with-key-in-box", which means lockers).
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I found the JR website gives you information about the facilities at each station, including whether there are lockers, how many there are of each size, how much it is, etc.
One
last thing:
The lockers I used at Morioka station last year didn't have a coin slot in the door frame.
Instead there was an electronic control panel nearby where you paid and were issued a paper ticket instead of a key.
An id (code number or barcode) on the ticket opened the locker door when you return.
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We will travel around Japan by train and will make a few shorter stops with only a nights stay so it would be handy to be able to drop the bags at the station while doing some sightseeing before checking to the hotel. Is this a "normal" feature of japanese train stations? Are storage facilities automated or manual and how much should we expect to pay for it?   ( photo  by Andrew Stawarz)
Is there luggage storage at train stations in Japan?
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<trains><japan><luggage-storage>
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Coin lockers are a feature of most stations in Japan, and will usually cost ¥200-300 JPY per day depending on the size and location. Usually they are too small to accommodate check-in suitcase-sized luggage. Larger lockers cost 500 yen for 12 hours at Shinjuku, and 800 yen for 24 hours at Akihabara. For manned counters that accept larger pieces, ask around for nimotsu-azukari-dokoro (手荷物預かり所) or look for a "bag-with-key" icon on signs (not to confused with "bag-with-key-in-box", which means lockers). Lockers are available at railway stations in Japan and the cost depends on how long you use them. Large bags, however, may not fit inside, in which case you should look for the manned luggage deposit. The JR website is recommended for finding out what facilities are available at each station.
Lockers are available at Japanese railway stations. They have different sizes but may not be big enough for large suitcases so look for the manned luggage deposit. The cost of lockers depends on the length of time you use it. 100 yen coins are needed to operate the lockers. The JR website gives information on facilities available at railway stations in Japan.