> ## Documentation Index
> Fetch the complete documentation index at: https://docs.transitionzero.org/llms.txt
> Use this file to discover all available pages before exploring further.
# Japan
> This section provides specific details about Scenario Builder's model of Japan.
# Changelog
The Japan 1-node and 10-node model added to Scenario Builder
# Model scope
* Base year: 2023
* End year: 2050
* Spatial resolution:
* National (1-node)
* Regional (10-nodes):
* Shikoku (GRIDREGION-JPN-SH)
* Hokuriku (GRIDREGION-JPN-HR)
* Chubu (GRIDREGION-JPN-CB)
* Hokkaido (GRIDREGION-JPN-HK)
* Kansai (GRIDREGION-JPN-KA)
* Chugoku (GRIDREGION-JPN-CG)
* Tokyo (GRIDREGION-JPN-TK)
* Okinawa (GRIDREGION-JPN-OK)
* Tohoku (GRIDREGION-JPN-TH)
* Kyushu (GRIDREGION-JPN-KY)
* Temporal resolution:
* Low resolution (24-hourly and yearly) - 1 Timeslice
* Medium resolution (3-hourly and 3-monthly) - 32 Timeslices
# Data sourcing table
| **Input variable** | **Data source** | **Data standard** |
| :---------------------------------------------------------------------------- | :---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | :---------------- |
| Demand profiles - current | Japanese TSO data, scraped from individual TSO data portals via [OCCTO](https://occtonet3.occto.or.jp/public/dfw/RP11/OCCTO/SD/LOGIN_login#) | Gold |
| Demand profiles - future | Current demand profiles, combined with OCCTO & METI Strategic Plans ([2021](https://www.occto.or.jp/iinkai/masutapuran/2021/files/masuta_chukan.pdf) and [2023](https://www.meti.go.jp/shingikai/enecho/denryoku_gas/saisei_kano/pdf/049_s03_00.pdf)) | Silver |
| Annual demand - current | Japanese TSO data, scraped from individual TSO data portals via [OCCTO](https://occtonet3.occto.or.jp/public/dfw/RP11/OCCTO/SD/LOGIN_login#) | Gold |
| Annual demand - future | Current demand profiles, combined with OCCTO & METI Strategic Plans ([2021](https://www.occto.or.jp/iinkai/masutapuran/2021/files/masuta_chukan.pdf) and [2023](https://www.meti.go.jp/shingikai/enecho/denryoku_gas/saisei_kano/pdf/049_s03_00.pdf)) | Silver |
| Renewable profiles - current | In-house TransitionZero calculation, derived from [TSO data](https://occtonet3.occto.or.jp/public/dfw/RP11/OCCTO/SD/LOGIN_login#) | Silver |
| Renewable profiles - future | In-house TransitionZero calculation, derived from [TSO data](https://occtonet3.occto.or.jp/public/dfw/RP11/OCCTO/SD/LOGIN_login#) | Silver |
| Renewable potentials | Ministry of Enviroment, [Renewables Potential Survey](https://repos.env.go.jp/web/dat/report/r02/r02_whole.pdf) | Gold |
| Technology costs - current | TransitionZero in-house methodology ([https://www.transitionzero.org/insights/from-vision-to-voltage-with-tz-apg](https://www.transitionzero.org/insights/from-vision-to-voltage-with-tz-apg)) | Silver |
| Technology costs - future | TransitionZero in-house methodology ([https://www.transitionzero.org/insights/from-vision-to-voltage-with-tz-apg](https://www.transitionzero.org/insights/from-vision-to-voltage-with-tz-apg)) | Silver |
| Interconnector technology costs - current | TransitionZero in-house methodology ([https://www.transitionzero.org/insights/from-vision-to-voltage-with-tz-apg](https://www.transitionzero.org/insights/from-vision-to-voltage-with-tz-apg)) | Silver |
| Interconnector technology costs - future | TransitionZero in-house methodology ([https://www.transitionzero.org/insights/from-vision-to-voltage-with-tz-apg](https://www.transitionzero.org/insights/from-vision-to-voltage-with-tz-apg)) | Silver |
| Commodity costs - current | [Ministry of Economy, Trade and Industry Electricity Generation Cost Report](https://www.enecho.meti.go.jp/committee/council/basic_policy_subcommittee/2024/067/067_009.pdf) | Gold |
| Commodity costs - future | [Ministry of Economy, Trade and Industry Electricity Generation Cost Report](https://www.enecho.meti.go.jp/committee/council/basic_policy_subcommittee/2024/067/067_009.pdf) | Silver |
| Domestic interconnector capacity data - current | OCCTO & METI Strategic Plans ([2021](https://www.occto.or.jp/iinkai/masutapuran/2021/files/masuta_chukan.pdf) and [2023](https://www.meti.go.jp/shingikai/enecho/denryoku_gas/saisei_kano/pdf/049_s03_00.pdf)) | Gold |
| Domestic interconnector capacity data - future | OCCTO & METI Strategic Plans ([2021](https://www.occto.or.jp/iinkai/masutapuran/2021/files/masuta_chukan.pdf) and [2023](https://www.meti.go.jp/shingikai/enecho/denryoku_gas/saisei_kano/pdf/049_s03_00.pdf)) | Silver |
| Electricity cross border trade cost - current | n/a - no cross border trade | |
| Electricity cross border trade cost - future | n/a - no cross border trade | |
| Efficiency / Losses | Default, technology-specific | Silver |
| Minimum generation level | Default, technology-specific | Silver |
| Planned outages / Availability | Default, technology-specific | Silver |
| Discount rate | 3% - as assumed by Ministry of Economy, Trade and Industry | Gold |
| WACC | 3% - as assumed by Ministry of Economy, Trade and Industry | Gold |
| Power plant data (location, capacity, fuel, technology, start year, end year) | Biomass - [FIT portal](https://www.fit-portal.go.jp/)
Coal - [Global Energy Monitor](https://globalenergymonitor.org/) cross-referenced with [OCCTO annual report](https://www.occto.or.jp/en/information_disclosure/annual_report/2024_annualreport_241210.html) data
Gas - [Global Energy Monitor](https://globalenergymonitor.org/)
Geothermal - [Global Energy Monitor](https://globalenergymonitor.org/) cross-referenced with [Japanese Geothermal Association](https://www.chinetsukyokai.com/)
Hydropower pumped storage - [Global Energy Monitor](https://globalenergymonitor.org/) cross-referenced with [HJKS](https://hjks.jepx.or.jp/hjks/)
Hydropower reservoir and run of river - [OCCTO FY24 Annual Report](https://www.occto.or.jp/en/information_disclosure/annual_report/2024_annualreport_241210.html)
Nuclear - [Japan Atomic Industrial Forum](https://www.jaif.or.jp/cms_admin/wp-content/uploads/2025/03/jp-npps-operation20250314_en.pdf)
Oil - [Global Energy Monitor](https://globalenergymonitor.org/) cross-referenced with [HJKS](https://hjks.jepx.or.jp/hjks/)
Solar - [FIT portal](https://www.fit-portal.go.jp/) cross-referenced with [OCCTO FY24 Annual Report](https://www.fit-portal.go.jp/)
Battery storage - Long Term Decarbonisation Auction results, published by [OCCTO](https://www.occto.or.jp/)
Wind offshore - [FIT portal](https://www.fit-portal.go.jp/) cross-referenced with [Japanese Wind Power Association](https://jwpa.jp/en/information/11074/)
Wind onshore - [FIT portal](https://jwpa.jp/en/information/11074/) cross-referenced with [Japanese Wind Power Association](https://jwpa.jp/en/information/11074/) | Gold |