Hideki Shirakawa, a Nobel laureate in chemistry, has died at the age of 90. He was known for his work on conductive polymers, which led to him being awarded the Nobel prize in 2000. Shirakawa was a prominent figure in his field, recognized for his discovery and development of these polymers.

Further details about his life and achievements can be found through other sources. Shirakawa's work had a significant impact on the field of chemistry, and his Nobel prize win in 2000 was a notable recognition of his contributions.

The circumstances of his death are not specified in the available information.