| Masake, Hisane March 2, 2006 | Jansen, Marius; ; Madoka Kanai; Denis Twitchett 1989 |
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| Consulate General of Japan in New York | Inman, James January 21, 2011 |
Hickey, Michael; Fuentes, Milton A.
| UN Economic Commission for Europe | Therefore, for the sake of convenience, the notation of prefectural is "Tokyo" |
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| The Allied Occupation of Japan | The exact date of the holiday is announced on the first weekday of February of the previous year |