Maezawa Kyuso Industries. 

Maezawa Kyuso Industries Co., Ltd. is a Japanese enterprise that focuses on the creation, manufacturing, and distribution of essential water supply apparatus across Japan. Their extensive product range includes various pipeline components such as saddle-equipped corporation stops, diverse pipe fittings, ball-type isolation valves, water meters and their accompanying sets, crosslinked polyethylene (PEX) piping, complete indoor plumbing systems, joint-sealing compounds, twin tubes designed for reheating devices, and durable stainless steel fixtures. Established in 1937, the company's main operations are based in Tokyo, Japan.