Where can I find information on Mitsubishi 3800?

The Ki-67 was used for level bombing and (as the Yasakuni Type) torpedo bombing (it could carry one torpedo attached under the fuselage). The Ki-67 was initially used by the Japanese Army and Navy Air Services against the US Navy 3rd Fleet during its strikes against Formosa and the Ryukyu Islands. It was later used at Okinawa, in China, and against B-29 airfields in Saipan, Tinian, and Guam in support of Giretsu (a special unit of the Japanese Imperial Army) strikes. One special ground-strike version used in the Giretsu missions was a Ki-67 I with three remote-control 20 mm cannons, angled at 30 degrees for firing toward the ground, a 20 mm cannon in the tail, 13.2 mm machine guns in the lateral and upper positions, and more fuel capacity. Even with more fuel capacity, the Giretsu missions were one-way attack missions because of the long range. In the last stages of WWII, special attack versions of the Ki-67 (the I KAI and Sakura-dan models) were used in Kamikaze missions. (References include information from Lt. Sgt. Seiji Moriyama, a crew member in Fugaku Special Attack Unit, who witnessed Ki-67's being converted into To-Go suicide planes with two 800 kg bombs during Okinawa operations.)