Hat tip to Aviation of Japan's Texas correspondent Mark Smith for providing a link to an interesting wartime film showing the Mitsubishi Ki-46-II Dinah in operation. Of note is the very pristine and semi-gloss finish of the paintwork - no salt treatment paint wear in evidence! Also apparent is the lighter tone of the ailerons, elevators and rudders. The film begins with a segment at a maintenance establishment (?) with a glimpse of the rare trainer variant and then shows operational aircraft with tail insignia attributed in different references either to the direct command reconnaissance unit of the 6th Air Army or the Dokuritsu Hiko Dai 82 Chutai (82nd Independent Air Squadron) - and usually associated with Ki-46-III variants.
Tail character 'Tsu'
Tail character 'Ru' in circle and command stripes
6th Air Army or 82nd Independent Air Squadron?
Image credits: mitupuu via https://www.youtube.com/watch?v=bcZGDKFUaZY