| English nameソート | Scientific nameソート | Found Dateソート | Prefectureソート | City/Locality | 
        
          | Harbour porpoise | Phocoena phocoena | 20, April, 2022 | Hokkaido | Toyosaki-cho Hakodate-shi | 
        
          | Harbour porpoise | Phocoena phocoena | 20, April, 2022 | Hokkaido | Hakodate-shi | 
        
          | Long-beaked common dolphin | Delphinus sp. | 17, April, 2022 | Miyazaki-ken | Futo Nichinan-shi | 
        
          | Long-beaked common dolphin | Delphinus sp. | 17, April, 2022 | Kagoshima-ken | 錦江湾入り口付近 | 
        
          | Short-finned pilot whale | Globicephala macrorhynchus | 16, April, 2022 | Kagoshima-ken | Oshima-gun Tatsugo-cho | 
        
          | Ribbon seal | Histriophoca fasciata | 15, April, 2022 | Hokkaido | Shibetsu-gun Shibetsu-cho | 
        
          | Pacific white-sided dolphin | Lagenorhynchus obliquidens | 15, April, 2022 | Nagasaki-ken | Sasebo Bay Saikai-shi | 
        
          | Harbour porpoise | Phocoena phocoena | 14, April, 2022 | Hokkaido | Itanki beach Muroran-shi | 
        
          | Finless porpoise | Neophocaena asiaeorientalis | 12, April, 2022 | Chiba-ken | Asahi-shi | 
        
          | Finless porpoise | Neophocaena asiaeorientalis | 12, April, 2022 | Aichi-ken |  | 
        
          | Dall's porpoise | Phocoenoides dalli (dalli type) | 11, April, 2022 | Hokkaido | Futatsuiwa Abashiri-shi | 
        
          | Finless porpoise | Neophocaena asiaeorientalis | 09, April, 2022 | Oita-ken | Furuichi-machi Sekinoe beach Beppu-shi | 
        
          | Dall's porpoise | Phocoenoides dalli (dalli type) | 02, April, 2022 | Hokkaido | Hokuto-shi | 
        
          | Finless porpoise | Neophocaena asiaeorientalis | 02, April, 2022 | Nagasaki-ken | Off Shishigawa-go Nishisonogi-gun, Togitsu-cho | 
        
          | Pygmy killer whale | Feresa attenuata | 02, April, 2022 | Kagoshima-ken | Nishinoomote-shi | 
        
          | Harbour porpoise | Phocoena phocoena | 29, March, 2022 | Hokkaido | Akkeshi-gun Hamanaka-cho | 
        
          | Finless porpoise | Neophocaena asiaeorientalis | 29, March, 2022 | Yamaguchi-ken | Ube-shi | 
        
          | Humpback whale | Megaptera novaeangliae | 28, March, 2022 | Okinawa-ken | Urasoe-shi | 
        
          | Finless porpoise | Neophocaena asiaeorientalis | 28, March, 2022 | Nagasaki-ken | Saikai-shi | 
        
          | Sperm whale | Physeter macrocephalus | 27, March, 2022 | Saga-ken | Imari Bay |