Question: Who was born first, Ryuichi Kawamura or Jason Scheff?

full_context: Document 1: Danny Seraphine: Daniel Peter "Danny" Seraphine (born August 28, 1948) is an American drummer, record producer, theatrical producer and film producer. He is best known as the original drummer and founding member of the rock band Chicago, a tenure which lasted from February 1967 to May 1990.
Document 2: Chicago 18: Chicago 18 is the fifteenth studio album by the American band Chicago, released on September 29, 1986. As the successor to 1984's multiplatinum hit "Chicago 17", this album is the first without cofounding member Peter Cetera. This is also the first album to feature Jason Scheff on bass guitar and vocals.
Document 3: Tourbillon (band): Tourbillon (トゥールビヨン , Tūrubiyon , French for "whirlwind") is a Japanese musical project formed in 2005 by Luna Sea members Ryuichi Kawamura (vocals) and Inoran (guitar), and D-Loop member Hiroaki "H. Hayama" Hayama (keyboards).
Document 4: Chauncy (album): Chauncy is the 1996 debut solo album by singer/songwriter/bassist Jason Scheff. Scheff is probably best known as a member of the band Chicago, where he has been the bassist and a lead singer since 1985. It also featured the only officially available recording of his 1993 co-composition "Mah Jongg" prior to the release of the original Chicago recording in 2008.
Document 5: Billy Sheehan: William "Billy" Sheehan (born March 19, 1953), is an American bassist known for his work with Talas, Steve Vai, David Lee Roth, Mr. Big, Niacin, and The Winery Dogs. Sheehan has won the "Best Rock Bass Player" readers' poll from "Guitar Player" magazine five times for his "lead bass" playing style. Sheehan's repertoire includes the use of chording, two-handed tapping, right-hand "three-finger picking" technique and controlled feedback.
Document 6: What Kind of Man Would I Be?: "What Kind of Man Would I Be?" is a song written by Jason Scheff, Chas Sandford and Bobby Caldwell and recorded by the band Chicago for their 1988 album "Chicago 19" and 1989 album "Greatest Hits 1982–1989". Scheff sang the lead vocals.
Document 7: Jason Scheff: Jason Randolph Scheff (born April 16, 1962, in San Diego) is an American bassist, singer, and songwriter. From 1985 to 2016 he was the bassist and singer for the veteran pop-rock band Chicago.
Document 8: Kyosuke Himuro: Kyosuke Himuro (氷室 京介 , Himuro Kyōsuke , born October 7, 1960 in Takasaki, Gunma, Japan) is a Japanese singer-songwriter and musician. He was a lead vocalist of the rock band Boøwy from 1981 to 1988. After the group disbanded he started a successful solo career, becoming one of Japan's best-selling artists. In 2003, HMV Japan ranked Himuro at number 76 on their list of the 100 most important Japanese pop acts. He currently lives in Los Angeles, California, where he purchased a palatial residence in Beverly Hills in 2004, which was previously owned by Shaquille O'Neal.
Document 9: Jason Newsted: Jason Curtis Newsted (born March 4, 1963) is an American metal musician, known for being the third recording bass guitarist with the band Metallica from October 1986 until his departure in January 2001, as well as being a part of Voivod and Flotsam and Jetsam. After leaving Metallica he continued with his project Echobrain, played with Ozzy Osbourne and joined heavy metal band Voivod. Newsted uses the pseudonym Jasonic, which serves as both his alias in Voivod and the name of his music publishing company. He is also the founder of the Chophouse Records studio and label based in California. From 2012 to 2014 he played in his self-titled band Newsted, for which he provided lead vocals as well as bass. Newsted lives in Alamo, California.
Document 10: Peter Cetera: Peter Paul Cetera ( ; born September 13, 1944) is an American singer, songwriter, and bassist best known for being an original member of the rock band Chicago (1967–1985), before launching a successful solo career. His career as a recording artist encompasses seventeen albums with Chicago and eight solo albums.
Document 11: Ryuichi Sakamoto: Ryuichi Sakamoto (坂本 龍一 , Sakamoto Ryūichi , born January 17, 1952) (] ) is a Japanese musician, composer, record producer, pianist, activist, writer, actor and dancer, based in Tokyo and New York. He began his career while a university student as a session musician, producer, and arranger in the 1970s, first gaining major success in 1978 as one third of the electronic music group Yellow Magic Orchestra (YMO). The band had worldwide hits such as "Computer Game / Firecracker" (1978), "Behind the Mask" (1978), and "Rydeen" (1979), playing a pioneering role in the development of the synthpop, techno and house genres.
Document 12: Inoran: Kiyonobu Inoue (井上 清信 , Inoue Kiyonobu , born on September 29, 1970 in Hadano, Kanagawa) , known exclusively by his stage name Inoran, is a Japanese musician, singer and songwriter. He is best known as the rhythm guitarist and a co-founder of the rock band Luna Sea. He started his solo career in 1997 and when Luna Sea disbanded in 2000, he formed Fake? with Oblivion Dust vocalist Ken Lloyd a year later. Then in 2005 when leaving Fake? he founded Tourbillon with Luna Sea vocalist Ryuichi Kawamura and Hiroaki Hayama. He has recently rejoined Luna Sea as they reunited in 2010, and in 2012 formed Muddy Apes with bassist Taka Hirose and support guitarist Dean Tidey, both from Feeder, and 8otto's vocalist Maeson.
Document 13: Toru Yamashita: Toru Yamashita (山下 亨 , Yamashita Tōru ) (born December 7, 1988 in Osaka), better known by his stage name Toru, is a guitarist and leader in the Japanese rock band ONE OK ROCK. He was in the hip-hop group HEADS along with Ryota Kohama from ONE OK ROCK before they disbanded in 2002.
Document 14: Toshi (musician): Toshimitsu Deyama (出山利三 , Deyama Toshimitsu , born October 10, 1965 in Tateyama, Chiba) , known exclusively by his stage name Toshi, is a Japanese singer and songwriter. He is best known as the lead vocalist and a co-founder of the heavy metal band X Japan, which disbanded in 1997. Toshi then went on to have an extensive solo career. In 2007, X Japan reunited and began an ongoing world tour in 2010. His distinctive, impassioned tenor vocals have been compared to those of Steve Perry.
Document 15: Ryuichi Kawamura: Ryuichi Kawamura (河村 隆一 , Kawamura Ryūichi , born May 20, 1970 in Yamato, Kanagawa) is a Japanese singer-songwriter, actor and record producer. He is best known as lead singer of the rock band Luna Sea. After the group disbanded in 2000, Kawamura continued his successful solo career. In 2005 he formed Tourbillon with fellow Luna Sea member Inoran and Hiroaki Hayama. He has recently rejoined Luna Sea, as they reunited in August 2010.
ground_truth: Jason Randolph Scheff