From Washington: Four Japanese individuals have been recognized with US Lasker Awards in medicine. Masashi Yanagisawa, a sleep scientist, is among the recipients. Three other Japanese researchers also received the award for their work on a hemophilia treatment drug developed at Chugai Pharmaceutical.

Further details about their achievements and the awards are available from the source. The recognition highlights the contributions of these Japanese researchers to the field of medicine.

The Lasker Awards acknowledge outstanding contributions to medical science and public health, but additional information about the specific awards and the researchers' work is not provided here.