Question: Are Yukihiro Takahashi and Shagrath both record producers?

Context articles: Yellow Magic Orchestra
Blue Moon Blue
Chasm (Ryuichi Sakamoto album)
Haruomi Hosono
Sketch Show (band)
Saravah!
Shagrath
Neuromantic (album)
Yukihiro Takahashi
Faker Holic

Yellow Magic Orchestra (abbreviated as YMO) is a Japanese electronic music band consisting of principal members Haruomi Hosono (bass, keyboards, vocals), Yukihiro Takahashi (drums, lead vocals) and Ryuichi Sakamoto (keyboards, vocals).
 For their early studio albums and live performances, the band was often accompanied by music programmer Hideki Matsutake.
Blue Moon Blue is a 2006 album by drummer Yukihiro Takahashi, current member of YMO.
Chasm (stylized as CHASM) is the 15th studio album by Ryuichi Sakamoto and was released in 2004.
 The album is experimental, pairing Sakamoto's piano work with ambient and glitch programming.
 Notably, Sakamoto's former bandmates from Yellow Magic Orchestra, Haruomi Hosono and Yukihiro Takahashi, contribute on several songs under their own production name, Sketch Show.
Haruomi Hosono (細野 晴臣 , Hosono Haruomi , born July 9, 1947) , sometimes credited as Harry Hosono, is a Japanese musician, singer, songwriter and record producer.
 He is best known internationally as a member of the rock band Happy End and the electronic music band Yellow Magic Orchestra with Yukihiro Takahashi and Ryuichi Sakamoto.
Sketch Show is a Japanese duo formed in 2002 by two of the three former members of Yellow Magic Orchestra, Haruomi Hosono and Yukihiro Takahashi.
 In some live shows, Ryuichi Sakamoto has joined in band performances.
Saravah!
 is Yukihiro Takahashi's first solo album.
 It's named after Pierre Barouh's record label of the same name.
 Takahashi conceived the album during his tenure on The Sadistics; he based his music on French pop music, this influence would later show up on early Yellow Magic Orchestra material.
 Besides Takahashi, this album features performances by members of The Sadistics, YMO and Tin Pan Alley.
 Due to the album being made before YMO members started using computers, Sakamoto got involved in arranging the music; all the keyboard parts on the album are dubbed instead of sequenced.
Stian Thoresen (born 18 November 1970) is a Norwegian musician best known as the vocalist, founding member and multi instrumentalist of Dimmu Borgir.
Neuromantic is Yukihiro Takahashi's self-produced 1981 album and featured his YMO colleagues Haruomi Hosono and Ryuichi Sakamoto on keyboards.
 Tony Mansfield and Phil Manzanera also played on the album.
 The title of William Gibson's novel "Neuromancer" is inspired by this album's title, which is a pun on the early 1980s British fashion movement, the "New Romantics".
Yukihiro Takahashi (高橋 幸宏 "Takahashi Yukihiro", born June 6, 1952) is a Japanese musician, singer, record producer and actor, who is best known internationally as the drummer and lead vocalist of the Yellow Magic Orchestra, and as the former drummer of the Sadistic Mika Band.
 He is currently a member of the group Metafive.
Faker Holic: YMO World Tour Live is a live album by Yellow Magic Orchestra.
 The material on this live album was recorded during various concerts in 1979, and was released as a double CD in 1991.
 Several songs appeared on the 1979 live album "Public Pressure", with Kazumi Watanabe's guitar parts overdubbed with keyboards and Yukihiro Takahashi's vocals replaced with those re-recorded later in studio.
 This album restores Watanabe's guitar parts (but not Takahashi's vocals).
 "Kang Tong Boy" is a song by Akiko Yano, who performed additional keyboards and backing vocals on this tour.