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postage
1956, Jul unwmk p. 13x13.5
| - | 55y | multi | water plants |
1967, Jul 1 1967 issue p. 13
| X | 55y | multi | Water plants Lake Akan | — | — |
airmail
1951 1951 issue (no perf info)
| - | 55y | plane over Mt Tsurugi-dake | — | — |
1952 1952 issue p. 13x13.5
| - | 55y | plane over Mt Tsurugi-dake |
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