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Enjoy the VVVF sound of the last Doremi train in Japan, Keikyu 1000 series 1033 train! Keikyu, famous for its "singing train" and "Doremi inverter", introduced the 2100 singing train in 1998, and then in 2002, introduced the new 1000 series, which evolved from the 2100 series to a type where the synchronous mode entry modulation sound sings and shouts. The 2100 series and the new 1000 series together have gained nationwide recognition. However, the Doremi inverter is made overseas (by Siemens in Germany) and is inferior in reliability, durability, and maintainability to Japanese inverters (Toyo Electric and Mitsubishi Electric), so since around 2010, they have been gradually replaced with Japanese inverters. The last survivor is this 1033 train! Sound quality: ★★★★★ 5 Postscript The Doremi inverter will no longer sing as of July 20, 2021. The 1033 train will be renewed and will depart again with a different sound. [Good Sound♪ Sound Train Video Series No. 325]