On 22 October 2024, the Electricity Safety Division of the Ministry of Economy, Trade, and Industry (METI) partially revised its 'Interpretation of the technical standards for electrical installations,' which paves the way for the installation of 1,000 V-class super-fast chargers in the Japanese market.

Before this relaxation of the Interpretation, as for the additional security requirements for fast charging facilities for EVs, only low-voltage chargers with a ground voltage of 450V or less had clearly been specified. METI had conducted a survey of risks with reference to other regions' standards operating at high voltages up to 1,500 V, and finally decided to revise the Interpretation. As a result of this revision, the description of the operation of chargers up to 1,500 V under the command of a 'chief electrical engineer' is now clearly defined, encouraging the installation of 1,000 V-class super-fast chargers in public places. 

The METI announcement is found here (Japanese only). 

In view of this ease of regulations, charger manufactures had already started the development of their next-generation super-fast chargers. The joint development of such a charger by e-Mobility Power and Takaoka Toko is one example. This 400 kW CHAdeMO charger with the maximum voltage of 1,000 V can charge an EV at up to 350 kW, or two vehicles simultaneously at 200 kW each, and is scheduled to debut in the market in autumn 2025.