| English nameソート | Scientific nameソート | Found Dateソート | Prefectureソート | City/Locality | 
        
          | Unidentified Mesoplodon | Mesoplodon sp. | 14, April, 1997 | Hokkaido | Matsumae-gun Fukushima-Cho | 
        
          | Pacific white-sided dolphin | Lagenorhynchus obliquidens | 13, April, 1997 | Niigata-ken |  | 
        
          | Spotted seal | Phoca largha | 13, April, 1997 | Hokkaido | Monbetsu-gun Okoppe-Cho | 
        
          | North Pacific right whale | Eubalaena japonica | 12, April, 1997 | Kagoshima-ken | Oshima-gun Uken-Son | 
        
          | Pacific white-sided dolphin | Lagenorhynchus obliquidens | 11, April, 1997 | Niigata-ken |  | 
        
          | Minke whale | Balaenoptera acutorostrata | 09, April, 1997 | Hokkaido | Nemuro-shi | 
        
          | Pacific white-sided dolphin | Lagenorhynchus obliquidens | 09, April, 1997 | Niigata-ken |  | 
        
          | Sperm whale | Physeter macrocephalus | 08, April, 1997 | Tokyo-to | Mikurajimamura | 
        
          | Common dolphin | Delphinus delphis | 05, April, 1997 | Kanagawa-ken | Yokohama-shi | 
        
          | Stejneger's beaked whale | Mesoplodon stejnegeri | 02, April, 1997 | Yamagata-ken | Akumi-gun Yuza-Machi | 
        
          | Stejneger's beaked whale | Mesoplodon stejnegeri | 01, April, 1997 | Akita-ken |  | 
        
          | Stejneger's beaked whale | Mesoplodon stejnegeri | 01, April, 1997 | Aomori-ken |  | 
        
          | Sperm whale | Physeter macrocephalus | 30, March, 1997 | Tokushima-ken | Anan-shi | 
        
          | Baird's beaked whale | Berardius bairdii | 26, March, 1997 | Hokkaido | Tokoro-cho | 
        
          | Pacific white-sided dolphin | Lagenorhynchus obliquidens | 26, March, 1997 | Ishikawa-ken | Kaga-shi | 
        
          | Finless porpoise | Neophocaena asiaeorientalis | 22, March, 1997 | Fukuoka-ken |  | 
        
          | Harbour porpoise | Phocoena phocoena | 20, March, 1997 | Hokkaido | Muroran-shi | 
        
          | Minke whale | Balaenoptera acutorostrata | 15, March, 1997 | Niigata-ken |  | 
        
          | Pacific white-sided dolphin | Lagenorhynchus obliquidens | 12, March, 1997 | Niigata-ken | Kashiwazaki-shi | 
        
          | Humpback whale | Megaptera novaeangliae | 12, March, 1997 | Wakayama-ken |  |