The factory will produce lithography materials for use in chipmaking, with the first phase of investment to be completed by 2026 as Shin-Etsu looks to tap into growing customer demand and diversify its production base.

Shin-Etsu, which makes lithography materials including photoresists and photomask blanks, already has facilities in Niigata prefecture, Fukui prefecture and Taiwan. It will use its own funds for the investment in the new factory.

Japan is seeing a wave of investment in its semiconductor sector, which supplies chips essential to the defence, automotive and electronics industries, with the government supporting the expansion of capacity by domestic and foreign chipmakers.

($1 = 151.8700 yen)

(Reporting by Sam Nussey; Editing by Jamie Freed)