Below is the average daily output per kW of Solar PV installed for each season, along with the ideal solar panel tilt angles calculated for various locations in Japan. Click on any location for more detailed information.

Explore the solar photovoltaic (PV) potential across 157 locations in Japan, from Shihoro to Naha. We have utilized empirical solar and meteorological data obtained from NASA's POWER API to determine solar PV potential and identify the optimal panel tilt angles for these locations.

Feel free to contact us if you wish for us to include a general Solar PV Analysis for a certain city or location not already listed here for Japan. We will be more than happy to manually add it for you.

Location	Subdivision	Latitude	Longitude	kWh/day Summer	kWh/day Autumn	kWh/day Winter	kWh/day Spring	Panel Tilt Angle
Shihoro	Hokkaido	43.1707	143.2502	5.76	3.00	2.16	4.83	38° South
Sapporo	Hokkaido	43.0459	141.3543	6.27	3.09	1.50	4.73	36° South
Muroran	Hokkaido	42.3307	140.9942	5.65	3.16	1.57	4.76	36° South
Iwaizumi	Iwate	39.8524	141.7977	5.20	3.22	2.30	5.01	35° South
Akita	Akita	39.7185	140.1211	5.59	3.27	1.84	4.63	34° South
Morioka	Iwate	39.7014	141.1403	5.22	3.28	2.37	5.05	35° South
Chuo	Miyagi	38.2988	141.0028	5.27	3.52	2.60	5.33	34° South
Sendai	Miyagi	38.2561	140.8611	5.28	3.21	2.05	5.01	33° South
Aizu-wakamatsu Shi	Fukushima	37.4868	139.9502	5.54	3.44	1.96	4.83	32° South
Nagaoka	Niigata	37.4506	138.858	5.82	3.54	1.94	4.98	32° South
Kōriyama	Fukushima	37.4047	140.3876	5.20	3.33	2.59	5.17	33° South
Kashiwazaki	Niigata	37.379	138.553	5.83	3.60	2.01	5.02	32° South
Shinkocho	Niigata	37.1547	138.2212	5.83	3.60	2.01	5.02	32° South
Utsunomiya	Tochigi	36.5722	139.8753	5.11	3.52	3.15	5.21	34° South
Takasaki	Gunma	36.3369	139.0191	5.09	3.46	3.08	5.17	33° South
Oyama	Tochigi	36.2982	139.7995	5.09	3.46	3.08	5.17	33° South
Tatebayashi	Gunma	36.2552	139.5468	5.09	3.46	3.08	5.17	33° South
Matsumoto	Nagano	36.2539	137.9783	5.29	3.58	2.19	4.94	32° South
Koga	Ibaraki	36.1672	139.719	5.09	3.46	3.08	5.17	33° South
Tsukuba	Ibaraki	36.1017	140.0817	5.41	3.58	3.24	5.25	33° South
Nishihara	Saitama	36.0199	139.7183	5.11	3.52	3.15	5.21	33° South
Nakamuramachi	Saitama	36.0035	139.0743	5.11	3.52	3.15	5.21	33° South
Toride	Ibaraki	35.9108	140.0639	5.55	3.47	3.18	5.13	33° South
Ryūgasaki	Ibaraki	35.9027	140.1809	5.55	3.53	3.24	5.16	33° South
Kashiwa	Chiba	35.8761	139.9802	5.28	3.62	3.50	5.26	33° South
Sakawa	Saitama	35.8727	139.6158	5.28	3.62	3.50	5.26	33° South
Motobuto	Saitama	35.8723	139.6636	5.28	3.62	3.50	5.26	33° South
Nishibori	Saitama	35.8612	139.6265	5.27	3.56	3.44	5.22	33° South
Misato, Saitama	Saitama	35.8502	139.8715	5.27	3.56	3.44	5.22	33° South
Ina	Nagano	35.823	137.9532	5.23	3.76	2.93	5.11	32° South
Inzai	Chiba	35.8184	140.1232	5.55	3.53	3.24	5.16	33° South
Asaka	Saitama	35.8152	139.5845	5.28	3.62	3.50	5.26	33° South
Niiza	Saitama	35.7963	139.5626	5.27	3.56	3.44	5.22	33° South
Kawaguchi	Saitama	35.7949	139.7334	5.28	3.62	3.50	5.26	33° South
Yazaike	Tokyo	35.7932	139.7552	5.28	3.62	3.50	5.26	33° South
Niikura	Saitama	35.7907	139.6203	5.27	3.56	3.44	5.22	33° South
Shirako	Saitama	35.7879	139.6317	5.28	3.62	3.50	5.26	33° South
Tagara	Tokyo	35.7731	139.6234	5.28	3.62	3.50	5.26	33° South
Katsushika	Tokyo	35.7622	139.8547	5.28	3.62	3.50	5.26	33° South
Adachi	Tokyo	35.7584	139.8073	5.28	3.62	3.50	5.26	33° South
Arakawa	Tokyo	35.754	139.7803	5.28	3.62	3.50	5.26	33° South
Shimohōya	Tokyo	35.7414	139.5396	5.27	3.56	3.44	5.22	33° South
Shakujiimachi	Tokyo	35.74	139.6038	5.28	3.62	3.50	5.26	33° South
Nukui	Tokyo	35.7366	139.6335	5.28	3.62	3.50	5.26	33° South
Hanakoganei	Tokyo	35.7287	139.5091	5.27	3.56	3.44	5.22	33° South
Taito	Tokyo	35.7284	139.7929	5.28	3.62	3.50	5.26	33° South
Oshiage	Tokyo	35.7268	139.833	5.28	3.62	3.50	5.26	33° South
Honcho	Chiba	35.7074	139.9955	5.28	3.62	3.50	5.26	33° South
Hyakuninchō	Tokyo	35.706	139.6958	5.28	3.62	3.50	5.26	33° South
Nakano	Tokyo	35.704	139.6713	5.28	3.62	3.50	5.26	33° South
Nishigokenchō	Tokyo	35.7038	139.7377	5.28	3.62	3.50	5.26	33° South
Kameido	Tokyo	35.703	139.8308	5.27	3.56	3.44	5.22	33° South
Minamiogikubo	Tokyo	35.7008	139.6248	5.28	3.62	3.50	5.26	33° South
Sakamachi	Tokyo	35.7003	139.7144	5.27	3.56	3.44	5.22	33° South
Nishikanda	Tokyo	35.6969	139.7798	5.28	3.62	3.50	5.26	33° South
Shinjuku	Tokyo	35.6948	139.6976	5.28	3.62	3.50	5.26	33° South
Edogawa	Tokyo	35.6907	139.8767	5.28	3.62	3.50	5.26	33° South
Chiyoda-ku	Tokyo	35.6887	139.745	5.28	3.62	3.50	5.26	33° South
Shimorenjaku	Tokyo	35.6871	139.5372	5.28	3.62	3.50	5.26	33° South
Shirakawa	Tokyo	35.6839	139.8018	5.28	3.62	3.50	5.26	33° South
Ginza	Tokyo	35.6761	139.7594	5.28	3.62	3.50	5.26	33° South
Shiohama	Tokyo	35.6738	139.8032	5.28	3.62	3.50	5.26	33° South
Tsukiji Fish Market	Tokyo	35.6737	139.7806	5.28	3.62	3.50	5.26	33° South
Uehara	Tokyo	35.6723	139.6939	5.28	3.62	3.50	5.26	33° South
Jingūmae	Tokyo	35.6708	139.701	5.28	3.62	3.50	5.26	33° South
Hachiōji	Tokyo	35.6672	139.3353	5.28	3.62	3.50	5.26	33° South
Kofu	Yamanashi	35.6641	138.5706	5.19	3.84	3.47	5.24	33° South
Kamiishiwara	Tokyo	35.6627	139.5295	5.28	3.62	3.50	5.26	33° South
Roppongi	Tokyo	35.6556	139.7378	5.27	3.56	3.44	5.22	33° South
Shibasaki	Tokyo	35.6499	139.5511	5.27	3.56	3.44	5.22	33° South
Tsurumaki	Tokyo	35.6376	139.6568	5.28	3.62	3.50	5.26	33° South
Higashigotanda	Tokyo	35.6362	139.7189	5.28	3.62	3.50	5.26	33° South
Toyosu	Tokyo	35.6289	139.7915	5.27	3.56	3.44	5.22	33° South
Tokyo	Tokyo	35.6289	139.7915	5.28	3.62	3.50	5.26	33° South
Shukugawara	Kanagawa	35.6211	139.5786	5.28	3.62	3.50	5.26	33° South
Daiba	Tokyo	35.6197	139.7638	5.27	3.56	3.44	5.22	33° South
Nakanobu	Tokyo	35.6144	139.7127	5.27	3.56	3.44	5.22	33° South
Minamimagome	Tokyo	35.5993	139.7075	5.28	3.62	3.50	5.26	33° South
Miyamae Ku	Kanagawa	35.5914	139.5829	5.27	3.56	3.44	5.22	33° South
Ōmorikita	Tokyo	35.5845	139.7385	5.27	3.56	3.44	5.22	33° South
Heiwajima	Tokyo	35.5819	139.7663	5.28	3.62	3.50	5.26	33° South
Wada	Tokyo	35.5621	139.8972	5.28	3.62	3.50	5.26	33° South
Sagamihara	Kanagawa	35.5602	139.2397	5.27	3.56	3.44	5.22	33° South
Minamirokugō	Tokyo	35.5502	139.7287	5.27	3.56	3.44	5.22	33° South
Tsuzuki Ku	Kanagawa	35.5446	139.5789	5.28	3.62	3.50	5.26	33° South
Machida	Tokyo	35.5381	139.4479	5.28	3.62	3.50	5.26	33° South
Tarumachi	Kanagawa	35.5341	139.6399	5.28	3.62	3.50	5.26	33° South
Okurayama	Kanagawa	35.5339	139.6285	5.28	3.62	3.50	5.26	33° South
Kawasaki	Kanagawa	35.5311	139.7314	5.28	3.62	3.50	5.26	33° South
Nakatsugawa	Gifu	35.485	137.4998	5.23	3.76	2.93	5.11	32° South
Matsue	Shimane	35.4818	133.0704	5.25	3.56	2.40	5.12	31° South
Minatomirai	Kanagawa	35.4643	139.6262	5.28	3.62	3.50	5.26	33° South
Minokamo	Gifu	35.452	137.0306	5.23	3.76	2.93	5.11	32° South
Kani	Gifu	35.4435	137.0645	5.23	3.76	2.93	5.11	32° South
Yokohama	Kanagawa	35.4343	139.6466	5.28	3.62	3.50	5.26	33° South
Mori	Kanagawa	35.4145	139.6127	5.27	3.56	3.44	5.22	33° South
Hadano	Kanagawa	35.3734	139.2227	5.28	3.62	3.50	5.26	33° South
Ōgaki	Gifu	35.3363	136.6173	5.24	3.79	2.55	4.98	32° South
Fujisawa	Kanagawa	35.3344	139.4687	5.28	3.62	3.50	5.26	33° South
Mutsuura-minami	Kanagawa	35.3266	139.6123	5.28	3.62	3.50	5.26	33° South
Tajimi	Gifu	35.3159	137.1298	5.24	3.81	2.99	5.14	32° South
Hikone	Shiga	35.2592	136.2362	5.24	3.79	2.55	4.98	31° South
Seto	Aichi	35.2256	137.0996	5.23	3.76	2.93	5.11	32° South
Susono	Shizuoka	35.1857	138.9227	5.19	3.84	3.47	5.24	33° South
Nagoya		35.1814506	136.9065571	5.24	3.79	2.55	4.98	31° South
Sannomaru	Aichi	35.179	136.8939	5.24	3.79	2.55	4.98	31° South
Tsuyama	Okayama	35.0562	133.999	5.25	3.56	2.40	5.12	31° South
Kyoto	Kyoto	35.0203	135.7602	5.16	3.69	2.46	5.00	31° South
Kariya	Aichi	35.0105	137.006	5.24	3.81	2.99	5.14	32° South
Chita	Aichi	34.991	136.8734	5.36	3.68	3.14	5.05	32° South
Tateyama	Chiba	34.9829	139.8635	5.55	3.57	3.30	5.25	32° South
Yokkaichi	Mie	34.972	136.6182	5.36	3.68	3.14	5.05	32° South
Okazaki	Aichi	34.9555	137.1653	5.71	3.92	3.30	5.32	32° South
Asahigaoka	Osaka	34.8283	135.4486	5.30	3.83	3.05	5.20	32° South
Takarazuka	Hyōgo	34.8244	135.3496	5.31	3.89	3.11	5.23	32° South
Nishinomiya	Hyōgo	34.8094	135.3661	5.31	3.89	3.11	5.23	32° South
Suita	Ōsaka	34.7643	135.5412	5.31	3.89	3.11	5.23	32° South
Toyohashi	Aichi	34.7533	137.383	5.71	3.92	3.30	5.32	32° South
Amagasaki	Hyōgo	34.7186	135.4396	5.31	3.89	3.11	5.23	32° South
Zengenjicho	Ōsaka	34.7123	135.5215	5.31	3.89	3.11	5.23	32° South
Kamitsutsuidori	Hyōgo	34.7065	135.2106	5.30	3.83	3.05	5.20	31° South
Ikoma	Nara	34.7037	135.713	5.30	3.83	3.05	5.20	31° South
Hamamatsu	Shizuoka	34.6988	137.7338	5.71	3.92	3.30	5.32	32° South
Umeda	Ōsaka	34.6947	135.5	5.31	3.89	3.11	5.23	32° South
Osaka		34.6937249	135.5022535	5.31	3.89	3.11	5.23	32° South
Kobe	Hyōgo	34.6922	135.1816	5.31	3.89	3.11	5.23	32° South
Taidera	Hyōgo	34.6534	134.9923	5.46	3.92	3.14	5.32	31° South
Akashi	Hyōgo	34.6534	134.9923	5.46	3.98	3.21	5.35	32° South
Okayama	Okayama	34.6501	133.9311	5.35	3.92	3.05	5.26	31° South
Takaminosato	Osaka	34.5712	135.5459	5.30	3.83	3.05	5.20	31° South
Ibukino	Ōsaka	34.4652	135.4482	5.31	3.89	3.11	5.23	31° South
Hiroshima	Hiroshima	34.3927	132.4501	5.22	3.81	2.86	5.18	31° South
Takamatsu	Kagawa	34.3316	134.0452	5.46	3.98	3.21	5.35	31° South
Wakayama	Wakayama	34.2281	135.1748	5.31	3.89	3.11	5.23	31° South
Kitakyushu	Fukuoka	33.8483	130.8477	5.37	4.03	3.01	5.17	30° South
Kitaku	Fukuoka	33.7937	130.687	5.37	4.03	3.01	5.17	30° South
Fukutsu Shi	Fukuoka	33.7734	130.5356	5.37	4.03	3.01	5.17	30° South
Hinosato	Fukuoka	33.7331	130.4806	5.37	4.03	3.01	5.17	30° South
Chūōku	Fukuoka	33.6399	130.668	5.37	4.03	3.01	5.17	30° South
Fukuoka	Kyushu	33.5901838	130.4016888	5.37	4.03	3.01	5.17	30° South
Muromi	Fukuoka	33.5815	130.3447	5.37	4.03	3.01	5.17	30° South
Tajiri	Fukuoka	33.5812	130.2352	5.37	4.03	3.01	5.17	30° South
Befu	Fukuoka	33.5713	130.3662	5.36	3.98	2.94	5.14	30° South
Hataeekikita	Fukuoka	33.57	130.2308	5.37	4.03	3.01	5.17	30° South
Ōnojō	Fukuoka	33.5326	130.4936	5.37	4.03	3.01	5.17	30° South
Kurume	Fukuoka	33.3174	130.4906	5.37	4.03	3.01	5.17	30° South
Beppu	Oita	33.2751	131.4773	5.21	4.01	3.16	5.16	30° South
Yamaga	Kumamoto	33.02	130.6851	5.37	4.03	3.01	5.17	30° South
Nagasaki	Nagasaki	32.7481	129.8816	5.48	4.14	2.86	5.07	29° South
Miyazaki	Miyazaki	31.9065	131.4185	5.25	4.29	3.47	4.68	30° South
Tomari	Okinawa	26.3676	127.7574	5.86	4.76	3.35	5.03	23° South
Yomitan	Okinawa	26.3372	127.7816	5.88	4.72	3.28	5.02	23° South
Yoshihara	Okinawa	26.3372	127.7816	5.86	4.76	3.35	5.03	23° South
Chatan	Okinawa	26.3372	127.7816	5.86	4.76	3.35	5.03	23° South
Okinawa	Okinawa	26.3317	127.813	5.86	4.76	3.35	5.03	23° South
Ginowan	Okinawa	26.2636	127.7548	5.86	4.76	3.35	5.03	23° South
Naha	Okinawa	26.2124	127.6757	5.86	4.76	3.35	5.03	23° South

Solar Panel Tilt Angle in Japan

So far based on Solar PV Analysis of 157 locations in Japan, we've discovered that the ideal angle to tilt solar PV panels in Japan varies between 38° from the horizontal plane facing South in Shihoro and 23° from the horizontal plane facing South in Naha.

These tilt angles are optimised for maximum annual PV output at each location for fixed-panel solar PV installations. If you click on one of the locations above, there is further detail on ideal seasonal tilt angles as well (in case your solar panels are adjustable).

Depending on where you are based in Japan, the ideal angle to tilt your solar panels will vary by approx 15 degrees (between 38° from the horizontal plane facing South and 23° from the horizontal plane facing South).

Japan solar PV Stats as a country

Japan ranks 3rd in the world for cumulative solar PV capacity, with 74,191 total MW's of solar PV installed. This means that 8.30% of Japan's total energy as a country comes from solar PV (that's 9th in the world). Each year Japan is generating 590 Watts from solar PV per capita (Japan ranks 4th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in Japan?

Yes, there are several incentives for businesses wanting to install solar energy in Japan. These include the Feed-in Tariff (FIT) program, which provides a fixed price for electricity generated from renewable sources such as solar; subsidies and grants from local governments; tax credits; and loans with low interest rates. Additionally, businesses may be eligible for additional incentives depending on their location and type of installation.

Do you have more up to date information than this on incentives towards solar PV projects in Japan? Please reach out to us and help us keep this information current. Thanks!

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Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide

Elevate the performance of your solar PV installation by utilizing our thorough guide. Determine the best panel tilt angle using real-world data, debunk prevalent misconceptions and grasp how geographical location influences solar power yield.