I actually think that P-51D flown by Scanlan was shot down by J2M3s
June 23, 1945
"Kanto District P-51 Interception Battle in Ibaraki"
11:40 Yokosuka Naval District issues alert for Yokosuka area.
Second alert deployment A (interception standby).
12:05 Air raid alert issued.
First alert deployment assumed.
11:50~ First Interception Force [302nd Air Group: 15 Raiden], Second Interception Force [Tsukuba Air Group/Fighter 402/403: 23 Shiden], Fourth Interception Force [601st Air Group/Fighter 308/310: 48 Zero Fighters] of Yokosuka 3rd Air Force take off.
99P51 P-51 fighters of the US 7th Fighter Corps, guided by B-29s, attack. The main targets are Kasumigaura Naval Base and Shimodate Army Airfield in Ibaraki Prefecture, with some invading Chiba Prefecture and Tochigi Prefecture. The 302nd Air Group appears to have engaged in combat with aircraft from the 506th Fighter Wing/458th Fighter Squadron over the Boso Peninsula.
1313 Air raid warning lifted.
[Formation]
15 Raiden
First Platoon
First Plane: Captain Ueno Norio, shot down, killed in action, engaged in combat with a P-51 from the 458th Fighter Squadron, crashed near Yachimata, Chiba Prefecture
Second Plane: shot down, parachuted
Third Plane: Sergeant Kudo Minoru
Fourth Plane: shot down, parachuted
First Platoon
First Plane: Lieutenant Akamatsu Sadaaki *Cooperative kill: 1 P-51 fighter [with Sergeant Saijo]
Number One Plane: Sergeant Saijo Toru *Cooperative kill: 1 P-51 fighter [with Lieutenant Akamatsu]
Sergeant Kobayashi Katsuji Downed, killed in action, engaged in combat with a P-51 from the 458th Fighter Squadron, crashed into a rice field in Sanbu-gun, Chiba Prefecture
[Battle results]
Unknown
[Total battle results]
Unknown
《US military records》
Losses: 3 P-51 fighters
[Damage]
Losses: 4 Raiden [1 suicide bomber, 1 not returning, 2 parachuted]
Crew killed in action: 2
[Total damage]
Down: 4 Shiden, 7 Zero fighters
Wrecked on the ground: 10 Zero fighters
[Casualties]
Captain Norio Ueno (72nd Marine Corps Class), 1st Squadron "Raiden Squadron"
Sergeant Kobayashi Katsuji (8th Class, Marine Corps Class), 1st Squadron "Raiden Squadron"
After that day
Interception battles were almost never carried out.
第三〇二海軍航空隊 (18) 昭和20年6月上旬飛行長:西畑喜一郎少佐が、横須賀鎮守府及び第七一航空戦隊/航空参謀に転勤。第一飛行隊長:山田九七郎少佐が、飛…
ameblo.jp
Tsukuba Kokutai had no victory claims on 23 June and the only claims were made by 302 Kokutai J2Ms. One of the claims was made by Akamatsu Sadaaki.