Interestingly, nobody knows !
This individual, or group of people, with the name Satoshi Nakamoto is credit with:
- Inventing Bitcoin in 2009
- Writing the original Bitcoin Whitepaper
- Writing the original Bitcoin software
It is claimed that he was born in 1975 and originates from Japan.
The person/group was involved in continued development of Bitcoin until the end of 2010. There has been no communications since.
A unit of Bitcoin called a "satoshi" was named after this person/group. A satoshi is one hundred millionth of a Bitcoin (0.00000001 BTC).