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Given what the Zero planes were used it it's almost assumed to be that.

The Mitsubishi A6M was used from 1940-45. It's the most famous of Japanese WW2 aircraft mainly due to it's performance and popularity with pilots, also quite a few were made.
Although some incidents of individual pilots choosing to ram an enemy may have happened earlier in the US/Japanese conflict, the Special Attack Units that used whatever aircraft were available were not officially organised until late 1944. There were also special aircraft, boats and submarines that were used by Special Attack Units.

https://en.wikipedia.org/wiki/Kamikaze
https://en.wikipedia.org/wiki/Japane...l_Attack_Units

Technically aircraft or boats/subs capable of larger payloads would seem a better option, but as soon as the enemy was aware of such attacks speed rather than large payload was more important.
The Ohka flying bomb was probably the best Kamikaze aircraft.