The Mitsubishi J2M Raiden, Code Name Jack, was designed to intercept bombers over the Japanese home islands. It climbed quickly due to its good power-to-weight ratio--max weight of ~7600 pounds with 1820 HP. And it packed a punch with four large cannon.
It also ran counter to Japanese aircraft design philosophy, trading light weight for a more robust airframe. Broadly speaking, it was the Japanese equivalent of the US P-47 Thunderbolt.
The LOOTM for October
The Mitsubishi J2M Raiden