Ki 84- 22 Sentai August-October 1944-China

[kaki3152]

Ok, here's a fairly obscure thread...
The mighty Ki-84 Hayate was introduced into service by the 22th Sentai (JAAF) in China during August-October 1944. In Izawa's book (JAAF Fighter units), the history shows them arriving on August 24,1944. During 6 weeks in China,they claimed ~40 victories (destroyed/damaged) before leaving on October 2,1944.
They lost their CO, MAj. Iwahashi in an attack on Xian A/F on September 21,1944 when he supposedly rammed a P-47. They left their Ki-84s when they returned to Japan

On November 11,1944 3 P-51s of the 23rd FG were shot down by Ki-84s. Since by then the 22th Sentai had left China,who was flying these Ki-84s? One clue is that on November 11,1944 (Izawa-JAAF) Maj. Goro Noguchi, 5 OTU (Operational Training Unit) was KIA in "Central China". Was the 5th JAAF OTU the unit that attacked the 23rd FG? Can anyone shed light on the 22th Sentai claims at this time?