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  1. Japanese mathematics (和算, wasan) denotes a distinct kind of mathematics which was developed in Japan during the Edo period (1603–1867). The term wasan , from wa ("Japanese") and san ("calculation"), was coined in the 1870s [1] and employed to distinguish native Japanese mathematical theory from Western mathematics (洋算 yōsan ).

  2. Kaigun-gensui (海軍元帥, Grand admiral), formal rank designations: Gensui-kaigun-taishō (元帥海軍大将, Marshal-admiral) was the highest rank in the prewar Imperial Japanese Navy. The term gensui was used for both the navy and the Imperial Japanese Army , and was a largely honorific title awarded for extremely meritorious service to ...

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