There are many suppliers of outdoor LED screens in Japan, including but not limited to the following brands and companies:
1. Mitsubishi, Japan: Mitsubishi Electric is a world-renowned comprehensive electronics company whose product lines cover display technology, including outdoor LED displays.
2. Idemitsu, Japan: IDEMITSU KOSAN CO., LTD. is a Japanese comprehensive chemical company that is also involved in the R&D and production of display technologies such as LED displays.
3. Teijin, Japan: Teijin Corporation is a multinational chemical company headquartered in Tokyo, Japan. It also provides LED displays and other related products.
4. Japan takarascale: This is a company specializing in the research, development and production of electronic products such as LED displays.
5. China Liangcai: Although China Liangcai is a Chinese brand, it also has a sales and service network in Japan to provide high-quality LED display products.
Please note that the companies and brands listed above are only some of them, and there are many other excellent outdoor LED screen suppliers in Japan. When selecting a supplier, it is recommended that you consider factors such as product performance, price, and after-sales service, and refer to other customers' reviews and feedback.