June 1943 "In order to follow the footsteps of Admiral Yamamoto, University and technical college students, who are scheduled to graduate in Autumn, requested and were granted permission to undergo a/c training at various units, every weekend starting from this June". Although initially we thought that the plane is a Yokosuka K5Y2, Mike Goodwin noticed that it has a 7-cylinder engine while the K5Y2 has a 9-cylinder one. Closer look also reveals that the fuselage struts are longer than those of the K5Y2. Therefore this is a Type 90 Floatplane Trainer (Yokosuka K4Y1.)

June 1943 "The battle of the South Pacific is becoming even more tragic. The enemy declared that its forces overrun "Mubo" island in New Guinea. This photo shows Navy Eagles taking off from the "Mubo" airfield". "Mubo" is most probably the Japanese pronunciation of the name of the island MUWO belonging to the Trobriand islands. The white diagonal band indicates that this plane belonged to the 1st Chutai of the Genzan Kokutai who had the letter "G" as a unit marking on the tail. According to Don Marsh who analyzed the close up of this photo (look further below): "There just isn't enough visual detail in the image to expand upon. But here's what I "think" I see: - It looks like the last digit is a "2". - I think the digit that precedes that may be a "5" or a "3". Probably a "3" because the Japanese navy seems to consistently use the "flat-top" 3 rather than the round one. - Since this is a bomber, the first digit would be a "3". - That would make the number "?-332. But this is mostly speculation on my part because of the lack of detail in the photo". So, the number of this plane could be "G-332".