The first floor entrance hall can be entered free of admission, and contains an A6M Zero fighter aircraft and a Class C56 steam locomotive number C56 31 used in Thailand during the post-war period.
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The large exhibit room on the first floor contains a Yokosuka D4Y bomber aircraft and Type 97 Chi-Ha recovered from Yap Island, along with a Kaiten-type torpedo and replicas of an Ohka Model 11 aircraft and Mutsu battleship.