Sorry for the late reply.
Hokkaido was attacked on 14 - 15 July 1945 by U.S.Navy. Because Hokkaido was too far for B-29s. So carrier-based aircraft of 38th Task Force attacked the Hokkaido whole area.
38th Tsk Force (Commanded by VADM J. S. McCain Sr.)
- 38.1st Task Force (Commanded by RADM T. L. Sprague) attacked East and North Hollaido
--- CV-16 Lexington, CV-19 Hancock, CV-20 BeningtonCVL-24 Belleau Wood, CLV-30 San Jancinto
- 38.3rd Task Force (Commanded by RADM F. Bogan) attacked Central and South Hokkaido
--- CV-9 Essex, CV-14 Ticonderoga, CV-15 Randolph, CVL-26 Monterey, CVL-29 Bataan
- 38.4th Task Force (Commanded by RADM A. W. Radford) attacked Tohoku and Tsugaru Strait
--- CV-10 Yorktown, CV-31 Bon Homme Richard, CV-38 Shangri La, CVL-22 Independence, CVL-25 Cowpens
The 1st photo was that of Avengers of CV-9 Essex taken by them. I saw a photo of Avenger's level bombing at the first time. The main purpose of 38.3. was the destruction of trade between Hokkaido and Honshu, that is, the sinking of the Seikan Ferries. The 2nd photo shows Seikan Ferry 翔鳳丸 Shoho Maru under bombing. At Hakodate Port and Aomori Port, eight Seikan Ferries were sunk, two were ran to ground and burned. The 3rd photo shows these Ferries. (Only 10 Atei Maru was sank on August 10th) With these, 425 people were dead or missing.
Tachibana confronted air raids in the Hakodate Port. The 4th photo shows the appearance of Tachibana. She was the 1st ship of Improved Matsu Class Destroyer, Tachibana Class. She had a twin 12.7cm gun, a single 12.7cm gun and many 25mm machine cannons.
The attack on Hakodate began at 5:00 AM. In order to protect civilian ships, Tachibana drew a figure of eight at full speed inside and outside the harbor and fired anti-aircraft. Hellcats invaded Hakodate repeatedly shot at her, killing many of her gunners. Her engine was damaged by a close bomb on her starboard side at 6:40 AM, and she was stuck and sank at 6:53 AM by deadly bombs on her stern. To avoid being shot by Grumman during the rescue, her survivors were rescued by fishing boats two hours after the air raid warning was lifted. According to the Tachibana Requiescats Monument erected at Hakodate Gokoku Shrine, of her 280 crew members, 140 were killed and 31 were injured. (Japanese Wiki says 157 men killed.)
The 5th photo shows Tachibana raised after the war. A single gun on her bow was hung with a high elevation angle, indicating that she was in anti-aircraft combat until she sank. (And on the starboard side, you can see the holes with the bombs of the closest explosion.) At this time, 80 skeletons were found inside her.
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