|  | site | site # (info) | collection date | kind | depth | substrate | salin | comments | reference | 
| A | Amakusa Marine Biological Laboratory, Tomioka, Kumamoto Prefecture, Japan | 4418 
  map | June 1937 |  |  |  |  | This species is very common in this district. | Kato K (1938): 565 | 
| B | Taejong (Taisei, Daisei), Cheju-do (Saisyu, Quelpart, Jeju, Tsitcheou-tao, Tse-tsiu, Tamara) Island, Korea | 4431 
  map | Jul 1936 |  |  |  |  | collected by Mr. Siro Okuda of the Hokkaido Imperial University, in the coasts of Korea.  Two specimens at Taisei in Saisyu Island. | Kato K (1937): 235 | 
| C | Yuno-shima (Yuno-sima, Yu-no Sima), Japan | 4445 
  map | 1938 |  |  |  |  | one of the most common polyclads found on the coasts of Japan.  A large number of them are found at Yuno-sima. | Kato K (1939): 146 | 
| D | Seto Marine Biological Station, Kyoto University, at Seto in Shirahama-cho, Cape Bansho Zaki (Bandokoro-saki),  Wakayama Prefecture, Japan | 4451 
  map | Apr 1937 |  |  |  |  | very common in this district. | Kato K (1938): 577, 584 | 
| E | Mitsui Institute of Marine Biology, Susaki near Simoda, Siduoka Prefecture, Japan | 4428 
  map | 1932-1933 |  |  |  |  | found in abundance in this district and Misaki all the year round; multi-tenticular forms often occur. | Kato K (1934): 123, 127 | 
| F | Biological Station Misaki, Japan | 1148 
  map | 1932-1933 |  |  |  |  | found in abundance in this district and Misaki all the year round; multi-tenticular forms often occur. | Kato K (1934): 123, 127 | 
| G | Ryukyu Islands (Loo Choo, Loochoo, Nansei, Luchu, Satsunan-shoto, Riukiu, Liukiu Inseln),  Okinawa Prefecture, Japan | 4488 
  map | 1944 or earlier |  |  |  |  | Loochoo. | Kato K (1944): 283 | 
| H | Asamusi (Asamushi), Aomori (Mutu) Prefecture, Japan | 4447 
  map | 1944 or earlier |  |  |  |  |  | Kato K (1944): 283 | 
| I | Sadoga-shima (Sado, Sado-ga-shima) Island, Japan | 4489 
  map | 1944 or earlier |  |  |  |  |  | Kato K (1944): 283 | 
| J | Cheju-do (Saisyu, Quelpart, Jeju, Tsitcheou-tao, Tse-tsiu, Tamara) Island, Korea | 4429 
  map | 1944 or earlier |  |  |  |  | Saisyu Island. | Kato K (1944): 283 | 
| K | Bonin Islands (Ogasawara-shoto, Arzonbispo, Arzobispo, Ogasawara-to, Ogasawara-gunto, Ogasawara group), Japan, Pacific Ocean | 1794 
  map | 1944 or earlier |  |  |  |  |  | Kato K (1944): 283 | 
| L | Fukaura, Aomori Prefecture, Japan | 7230 
  map | 2000 or earlier |  |  |  |  |  | Asano Y, Yoshida A, Isozaki N, Ishida S (2001): 137 |