A6M5b Type 0 Model 52乙
Lt. Sadaaki Akamatsu
Atsugi Air Base
The text under "3D-126" (伊藤一整曹 - Itō Kazumasa, Isshō-sō) refers to Sergeant Kazumasa Itō, likely a mechanic or crew member assigned to this aircraft.
The golden cherry blossom emblems represent aerial victories or distinguished achievements of the pilot, Ensign Sadaaki Akamatsu from the 302nd Naval Air Group in February 1945.