In the fiscal year 2021, the number of installed residential solar heating systems in Japan amounted to around *** thousand units. Even though the number of residential solar heating systems decreased continuously since fiscal 2005, figures remained larger than the number of commercial solar heating systems.
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Renewable Energy Institute. (December 8, 2022). Number of installed residential solar heating systems in Japan from fiscal year 2005 to 2021 (in 1,000 units) [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 25, 2026, from /statistics/1231819/japan-number-residential-solar-heating-systems/
Renewable Energy Institute. "Number of installed residential solar heating systems in Japan from fiscal year 2005 to 2021 (in 1,000 units)." Chart. December 8, 2022. ÌÇÐÄÆƽâ°æ. Accessed July 25, 2026. /statistics/1231819/japan-number-residential-solar-heating-systems/
Renewable Energy Institute. (2022). Number of installed residential solar heating systems in Japan from fiscal year 2005 to 2021 (in 1,000 units). ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 25, 2026. /statistics/1231819/japan-number-residential-solar-heating-systems/
Renewable Energy Institute. "Number of Installed Residential Solar Heating Systems in Japan from Fiscal Year 2005 to 2021 (in 1,000 Units)." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 8 Dec 2022, /statistics/1231819/japan-number-residential-solar-heating-systems/
Renewable Energy Institute, Number of installed residential solar heating systems in Japan from fiscal year 2005 to 2021 (in 1,000 units) ÌÇÐÄÆƽâ°æ, /statistics/1231819/japan-number-residential-solar-heating-systems/ (last visited July 25, 2026)
Number of installed residential solar heating systems in Japan from fiscal year 2005 to 2021 (in 1,000 units) [Graph], Renewable Energy Institute, December 8, 2022. [Online]. Available: /statistics/1231819/japan-number-residential-solar-heating-systems/
