Postage stamp collecting

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Ishii, Susumu - Frog Stamps of the World
Japanese stamp collectors that has an online gallery of frog stamps from all over the world

Iwata, Tadahiro - Japanese Stamps and History
Japanese stamp collectors website in Japanese dedicated to the history of Japan as illustrated or commemorated on stamps

Fujiwara, Ashra - Philately Luck
Japanese stamp collectors site in Japanese language with a horoscope for philatelists, predict your stamp collecting luck?!?

Kuzui, M - Medical Stamps Home Page
A Japanese stamp collectors site in Japanese language that is collecting medicine-themed stamps

Furuya, T. - Music on Stamps
Japanese stamp collectors site in Japanese language that is collecting music-themed stamps

Hirokazu Maki - Aramaki.com
A Japanese stamp collectors website who specializes in stamps from all over the world with unique designs (5-sided stamps or collections that form a collage, for example)