The Soyokaze (そよかぜ) was a limited express train service in Japan introduced by Japanese National Railways (JNR) in July 1968, and later operated by the East Japan Railway Company (JR East) between Ueno in Tokyo and Naka-Karuizawa on the Shinetsu Main Line in Nagano Prefecture.

[1][2] 9-car 489 series formations operating in later years were typically formed as shown below, with car 1 at the Ueno end.

[3] On 30 and 31 August 2003, JR East operated a special Soyokaze service between Ueno and Yokokawa using 189 series EMUs.

[4] On 15 July 2012, JR East ran a special Soyokaze service between Ueno and Yokokawa using a 185 series EMU in "Amagi"-style JNR era livery.

[5] On 8 September 2012, JR East ran a Soyokaze service between Ueno and Yokokawa using a 185 series EMU in "Amagi"-style JNR era livery.