''An improved version of the long-range, four-engine large bomber, "Shinzan".<br>Developed based on large passenger aircraft from the US, the engines were replaced and the airframe improved, but problems remained and it again was not adopted by the military.<br>Its features would be adopted by its successor, the "Renzan".
==Mechanics==
==Mechanics==
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==Improvement==
==Improvement==
{{:Improvement/Categories/Land-Based Heavy Bombers}}
{{:Improvement/Categories/Land-Based Heavy Bombers}}