PS Vita will be manufactured until 2019 in Japan and there are currently no plans for a successor, Sony Interactive Entertainment senior vice president Hiroyuki Oda told Famitsu at Tokyo Game Show 2018.
https://gematsu.com/2018/09/ps-vita-production-to-end-in-2019-in-japan
https://gematsu.com/2018/09/ps-vita-production-to-end-in-2019-in-japan