After the Ki-61 I Tei (http://rsmodels.cz/en/modely-letadel/plastikove-modely/1-72/92145/ki-61-i-tei & http://rsmodels.cz/en/modely-letadel/plastikove-modely/1-72/92143/ki-61-i-tei), Hei (http://www.britmodeller.com/forums/index.php?/topic/234982068-172-kawasaki-ki-61-1-hei-new-variant-by-rs-models-released/) and Ki-61 II Kai (http://rsmodels.cz/en/modely-letadel/plastikove-modely/1-72/92104/ki-61-ii-kai-with-bubble-canopy), RS Models is to release a 1/72nd Kawasaki Ki-61 I Otsu kit - ref.92179
Source: http://rsmodels.cz/en/modely-letadel/plastikove-modely/1-72/92179/ki-61-i-otsu
Box art
V.P.