Methane Synthesis test facility in Koshijihara Plant of INPEX’s - Nagaoa
Overview
StatusDemoInternational Energy Agency · as of 2026
Country · regionJapanNEDO · JP-15 Niigata PrefectureNEDO
TechnologyOther ElectrolysisInternational Energy Agency · as of 2026
Capacity values retain their recorded units and scope. MW, kt H₂/y and Nm³ H₂/h are different measures; this page does not convert or add them without a shared operating basis. “Other Electrolysis” and “Unknown PtX” are recorded classifications, not a specific electrolyzer design or power-to-X route.
Details
Technology & product
Componentsmethanation using a plate reactorNEDO
Configuration DetailUnknown PtXInternational Energy Agency · as of 2026
Project Typehydrogen production facilityNEDO
Status & timeline
Date online (tracker field)2019 (meaning under review)International Energy Agency · as of 2026
Location & names
Site NameKoshijihara Plant, Nagaoka Field OfficeNEDO
Aliasメタン合成試験設備NEDO
Official NameMethane Synthesis Test Facility for Effective Utilization of CO2NEDO
Additional project information
Administrative AreaNagaokaInternational Energy Agency · as of 2026
CountryJapanInternational Energy Agency · as of 2026
Timeline
- Commissioning start : 2019-10-16NEDO
Sources & record history
Sources
- IEA Hydrogen Projects dataset Shared by 7 fields: Snapshot 2026-06-18 · Confidence: reported · Older value (2026)
- NEDO NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html)
- H2Prism earlier record (SRC-C-P200)
Field sources
Shared date, confidence and value status appear once with their source above; a dash in the table refers to that source context.
| Field | Shown value | Original value | Source | Date basis | Meaning |
|---|---|---|---|---|---|
| Name | Methane Synthesis test facility in Koshijihara Plant of INPEX’s - Nagaoa | View exact valueMethane Synthesis test facility in Koshijihara Plant of INPEX’s - Nagaoa | IEA Hydrogen Projects dataset | — | — |
| Site Name | Koshijihara Plant, Nagaoka Field Office | View exact valueKoshijihara Plant, Nagaoka Field Office | NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Administrative Area | JP-15 Niigata Prefecture | View exact valueJP-15 Niigata Prefecture | NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Alias | メタン合成試験設備 | View exact value[{"kind":"source_label","name":"メタン合成試験設備"}] | NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Country | Japan | View exact valueJPN | NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Official Name | Methane Synthesis Test Facility for Effective Utilization of CO2 | View exact value[{"lang":"en","name":"Methane Synthesis Test Facility for Effective Utilization of CO2","evidence":["E-01"]}] | NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Components | methanation using a plate reactor | View exact value{"kind":"기타","tech":"기타","tech_raw":"methanation using a plate reactor","component_id":"CMP-1"} | NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Configuration Detail | Unknown PtX | View exact valueUnknown PtX | IEA Hydrogen Projects dataset | — | — |
| Project Type | hydrogen production facility | View exact valuehydrogen_production_facility | NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Technology | Other Electrolysis | View exact valueOther Electrolysis | IEA Hydrogen Projects dataset | — | — |
| Event | Commissioning start : 2019-10-16 | View exact value{"date":"2019-10-16","tags":{"as_of":"2019-10-16","source":"NEDO press release","evidence":["E-01"],"judged_by":"worker_review","confidence":"high","accessed_at":"2026-08-18T00:00:00Z"},"ev_type":"EV-11","event_id":"V-01","raw_date_text":"Completed and Commissioning Started for Full-scale Operation","date_precision":"day"} | NEDO (https://www.nedo.go.jp/news/press/AA5_101217.html); H2Prism earlier record (SRC-C-P200); H2Prism earlier record (SRC-C-P200) | Older value | |
| Event | Date online : 2019 | View exact value{"date":"2019","date_precision":"year","event":"Date online","basis":"iea_hydrogen_projects_raw.csv"} | IEA Hydrogen Projects dataset | — | — |
| Progress Status | Demo | View exact valueDEMO | IEA Hydrogen Projects dataset | — | — |
| Administrative Area | Nagaoka | View exact valueNagaoka | IEA Hydrogen Projects dataset | — | — |
| Country | Japan | View exact valueJapan | IEA Hydrogen Projects dataset | — | — |
Record history
0 current sourced values · 12 older values · Record updated