[July 18] 10th Anniversary Debut Concert by the “GrandBach String Quartet”
![[July 18] 10th Anniversary Debut Concert by the “GrandBach String Quartet”](https://www.grandbach.co.jp/wp-content/uploads/2026/06/周年音楽イベントキービジュアル.png)
The “GrandBach String Quartet” has been born as a new step forward in deepening the music that GrandBach has carefully nurtured.
On this occasion, marking the significant milestone of Hotel GrandBach Atami Crescendo’s 10th anniversary, we will hold the debut concert of this quartet.
This quartet was formed with the purpose of nurturing the next generation of performers and creating new venues for musical expression.
The selection of members was undertaken by Nobuki Okumura, conductor of “Orchestra Presenter Tokyo,” which develops music production across diverse fields including orchestra-centered concerts, events, and video productions.
Please enjoy this memorable inaugural performance and the fresh yet profound string quartet woven by four musicians of different generations and experience.
Conductor of “Orchestra Presenter Tokyo” Profile
Nobuki Okumura
Conductor and orchestra producer. He began conducting while attending Kunitachi College of Music and has since developed numerous creative orchestra projects unprecedented in their scope, including classical and pop concerts, soundtrack recordings, orchestra production for television, commercials, and films, large-scale events, and collaborations with renowned artists from various fields including Junko Koshino.
He has also conducted various orchestras and choirs across more than 10 countries throughout Europe, including Austria and Italy. In January 2025, in Oman in the Middle East, he conducted a solo performance with Orchestra Presenter Tokyo, for which he serves as music director, at “An Evening of Music & Friendship ‘Japan to Oman'” by invitation of the Oman-Japan Friendship Association in the presence of His Highness Sayyid, Special Envoy of His Majesty the Sultan, receiving tremendous acclaim.
“GrandBach String Quartet” Performer Profiles
Violin Soko Eriguchi
Born in Vienna. Graduated from Kunitachi College of Music, Department of Instrumental Music, Violin Major.
She has studied under Naoko Tashiro, the late Hideo Matsumura, Hiroaki Ozeki, B. Bibelauer, and U. Dannhofer. She performed Brahms violin sonatas with world-renowned pianist and Vienna University of Music professor Adrian Cox.
She is active internationally as a solo violinist, including Soko Eriguchi violin recitals. Principal concertmaster of Orchestra Presenter Tokyo.
Violin Ryotaro Kai
Graduated from Showa University of Music as a scholarship student and completed the graduate program at the same university.
He attended master classes at the Courchevel International Music Academy, Kyoto French Academy, and other domestic and international programs, and was selected to perform in completion concerts. He has won prizes and awards at the Japan Classical Music Competition, Osaka International Music Competition, All Japan Arts Competition, and others. He studied under Gérard Poulet and Tatsuro Nishie.
He is actively engaged in guest performances with Tokyo-based orchestras, studio recordings, film production collaboration, and directing a music school.
Viola Shota Sakachi
Graduated from Toho Gakuen College of Drama and Music, then from Kunitachi College of Music.
While attending Kunitachi College of Music, he was selected for the Mito Arts Foundation instrument loan audition and was loaned a violin made in 1804.
In 2024, he appeared as an orchestra member in the TBS Sunday drama “Sayonara Maestro: My Father and My Appassionato.”
He is currently actively engaged in orchestra performances, chamber music concerts, and visiting performances at facilities.
Cello Tamami Shimoyamada
Graduated from Kunitachi College of Music, Department of Instrumental Music, Cello Major.
She studied under Shuya Matsushita and Jun Onozaki.
Currently, as a freelance cellist, she performs across multiple fields through chamber music, professional orchestra concerts, TV and radio music programs, film and other background music, commercials, live performances and recordings with domestic and international artists, music video production, and various events.
Principal cellist of Orchestra Presenter Tokyo.
■ 10th Anniversary Commemorative “GrandBach String Quartet” Debut Concert Overview
Date: Saturday, July 18, 2026
Time:
4:30 PM (doors open) *Aperitifs and finger food will be provided.
5:00 PM–5:50 PM
Venue: Bay View Salon (1st floor)
Fee: Free for hotel guests. 6,500 yen (tax included) for general attendees
Seating: 35 seats
*Seats will be assigned on a first-come, first-served basis.
■ Reservations and Inquiries
Accepted by telephone.
TEL: 0557-82-1717

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