# JX to invest additional ¥3.3B in InP substrate production at Isohara plant

JX announced an additional ¥3.3 billion investment to expand indium phosphide (InP) substrate production capacity at its Isohara plant in Ibaraki Prefecture, Japan. Combined with a previous ¥1.5 billion investment, capacity will increase 1.5 times by fiscal 2027 compared to 2025.

- Type: Expansion
- Announced: 2025-10-15
- Where: Isohara Plant, Kitaibaraki, Ibaraki Prefecture, Japan
- Value: $22.0M (3.30B JPY)
- Starts operating: 2027
- Status: announced
- Capacity: 1.5 times increase by fiscal 2027 vs 2025
- Products: indium phosphide (InP) substrates
- Sectors: [Semiconductors and Industrial Electronics](https://endata.com/sectors/semiconductors-electronics.md)

## Companies

- [JX](https://endata.com/companies/87877.md)

## Sources

- [eetimes.itmedia.co.jp](https://eetimes.itmedia.co.jp/ee/articles/2510/15/news035.html), 2025-10-15: "JXは、光通信の受発光素子などに用いられる化合物半導体材料「インジウムリン（InP）基板」の生産能力を増強する。"

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Data from Endata (https://endata.com/). Announcements are summarized from public sources and may be incomplete; check the linked originals.