warbird1 wrote:
In the above profile illustration, there are two shapes used to signify kills. What do these represent? Why are there two different shapes - what do they mean?
Paging David Aiken or Ron Werneth...........

With apologies to both Mr. Aiken and Mr. Werneth...the suspense is killing me.
The left-hand symbol--the cherry blossom--typically represented a "probable" or "damaged" enemy. The marking on the right--a chrysanthemum--represented a definite kill. But both probable and definites were always a determination made by the pilot, as gun cameras were rarely (if ever) used in combat situations. Also, much variety exists in other forms of victory markings other than the cherry blossom and chrysanthemum.
Also note that victory markings in the Kaigun were typically attributed to the aircraft used in achieving the success rather than the pilot who was doing the flying.
Victory markings for individual successes were never officially sanctioned (and were to discontinue completely by 1943), but it seems the high command would often "look the other way" for the sake of morale.