one of the three full-size B-29 mock-ups constructed in Japan during the war, dummy aircrafts made of bamboo and wood planking.

https://www.theatlantic.com/photo/2016/04/bamboo-bombers-and-stone-tanksjapanese-decoys-used-in-world-war-ii/480186/
https://elpoderdelasgalaxias.wordpress.com/2017/09/13/boeing-b-29-the-japanese-and-their-nice-toys/