Hasegawa Kit #432. 1/700 scale. Hasegawa released this model kit of Japanese Navy Submarines I-370 & I-68 under the 'Water Line Series' in the early 1990s. The model kit includes two (2) submarines: IJN undersea transport vessel, I-370 and IJN KD6A class I-68, a new class of sub produced in the 1930s.