| Company name | Group | Parent | Subsidiary | Customer | Supplier | Alliance | Bank | Shareholder |
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| いっしん館 |
Founded: Initially engaged in construction and real estate businesses
Specialized in caregiving business with the start of the Long-term Care Insurance Law trial: Started home-visit care services
[Chiyoda Town, Ibaraki Prefecture]: Group Home Ichin-kan, Building 1, opened
[Chiyoda Town, Ibaraki Prefecture]: Group Home Ichin-kan, Building 2, opened
[Kasumigaura Town, Ibaraki Prefecture]: Group Home Ichin-kan Kasumigaura, Building 2, opened
[Kasumigaura Town, Ibaraki Prefecture]: Group Home Ichin-kan Kasumigaura, Building 1, opened
Organizational change to Corporation: Ichin Corporation
[Niihari Village, Ibaraki Prefecture]: Group Home Ichin-kan Niihari opened; Day Service Ichin opened
[Mito City, Ibaraki Prefecture]: Group Home Ichin-kan Mito opened
[Namegata City, Ibaraki Prefecture]: Group Home Ichin-kan Tamatsukuri opened
[Niihari Village, Ibaraki Prefecture]: Group Home Ichin-kan Komachi opened; Tsukuba Training Center opened
[Shiroi City, Chiba Prefecture]: Group Home Ichin-kan Shiroi opened
[Namegata City, Ibaraki Prefecture]: Group Home Ichin-kan Asao opened
[Mito City, Ibaraki Prefecture]: Group Home Ichin-kan Uchi-hara opened
[Ibaraki Town, Ibaraki Prefecture]: Group Home Ichin-kan Shijimi opened
[Kasumigaura City, Ibaraki Prefecture]: Group Home Ichin-kan Inari; Daycare Center Kobuta
[Yokohama City, Kanagawa Prefecture]: Group Home Ichin-kan Seya opened
[Ibaraki Prefecture, Tsukuba City]: Group Home Isshin-kan Tsukuba Opening
[Kanagawa Prefecture, Yokohama City]: Group Home Isshin-kan Izumi Opening
[Ibaraki Prefecture, Tsuchiura City]: Care-Enabled Paid Elderly Home Heart One Tsuchiura Opening
[Ibaraki Prefecture, Kasumigaura City]: Headquarters Building New Construction and Relocation (Inadate Station Front)
[Ibaraki Prefecture, Kasumigaura City]: Care-Enabled Paid Elderly Home Heart One Inadate Opening
[Ibaraki Prefecture, Omigata City]: Care-Enabled Paid Elderly Home Heart One Ogawa Opening
[Ibaraki Prefecture, Tsuchiura City]: Nursery Kobuta Relocation
[Ibaraki Prefecture, Tsuchiura City]: Service-Linked Senior Housing Kokoichi Tsuchiura Building A Opening
[Ibaraki Prefecture, Tsuchiura City]: Service-Linked Senior Housing Kokoichi Tsuchiura Building B Opening
[Ibaraki Prefecture, Gyōkō City]: Service-Linked Senior Housing Kokoichi Tamatsukuri Opening
[Ibaraki Prefecture, Mito City]: Service-Linked Senior Housing Kokoichi Uchiha Opening
[Ibaraki Prefecture, Kasumigaura City]: Service-Linked Senior Housing Kokoichi Kamitachi Opening
[Ibaraki Prefecture, Tsuchiura City]: Service-Linked Senior Housing Kokoichi Eikoku Opening
[Ibaraki Prefecture, Ryūgasaki City]: Service-Linked Senior Housing Kokoichi Ryūgasaki Opening
[Ibaraki Prefecture, Tsukuba City]: Service-Linked Senior Housing Kokoichi Yatabe Opening
[Ibaraki Prefecture, Moriya City]: Service-Linked Senior Housing Kokoichi Moriya Opening
[Ibaraki Prefecture, Ishioka City]: Service-Linked Senior Housing Kokoichi Ishioka Opening
[Ibaraki Prefecture, Mito City]: Service-Linked Senior Housing Kokoichi Mito Opening
[Ibaraki Prefecture, Kasumigaura City]: Service-Linked Senior Housing Kokoichi Inayoshi Opening
[Okinawa Prefecture, Uruma City]: Service-Linked Senior Housing Kokoichi Uruma Opening
[Saitama Prefecture Ageo City]: Service-equipped senior housing Kokoichi Ageo opened
[Ibaraki Prefecture Ryugasaki City]: Service-equipped senior housing Kokoichi Ryugasaki Building B opened
[Ibaraki Prefecture Shimotsuma City]: Service-equipped senior housing Kokoichi Shimotsuma opened
[Ibaraki Prefecture Higashiibaraki District Oarai Town]: Service-equipped senior housing Kokoichi Oarai opened
[Ibaraki Prefecture Kasumigaura City]: Paid elderly home Heart One Chiyoda opened
[Ibaraki Prefecture Ryugasaki City]: Service-equipped senior housing Kokoichi Ryugasaki Building C opened
[Ibaraki Prefecture Tsukuba City]: Nursery Kobuta II opened
[Okinawa Prefecture Uruma City]: Service-equipped senior housing Kokoichi Uezu opened
[Ibaraki Prefecture Hitachinaka City]: Service-equipped senior housing Kokoichi Hitachinaka opened
[Okinawa Prefecture Okinawa City]: Service-equipped senior housing Kokoichi Ikehara opened
[Saitama Prefecture Fukaya City]: Service-equipped senior housing Kokoichi Fukaya opened
[Ibaraki Prefecture Mito City]: Service-equipped senior housing Kokoichi Mito Joto opened
[Ibaraki Prefecture Kasumigaura City]: After-school day service Heart Kids Kasumigaura opened
[Ibaraki Prefecture Tsukuba City]: After-school day service Heart Kids Sakura opened
[Ibaraki Prefecture Tsuruga City]: Residential type paid elderly home Heart Living Tsuruga Central opened
[Ibaraki Prefecture Ryugasaki City]: Nursery Kobuta III opened
[Ibaraki Prefecture Ryugasaki City]: Social Welfare Corporation Ikkokai Disabled Persons Residential Support Facility Tenten Ryugasaki opened
[Ibaraki Prefecture Kasumigaura City]: Paid elderly home Heart One Kasumigaura opened
[Ibaraki Prefecture Kasumigaura City]: Social Welfare Corporation Ikkokai Disabled Persons Residential Support Facility Tenten Kasumigaura opened
Social Welfare Corporation Ikkokai Disabled Persons Residential Support Facility Tenten Tsuruga opened
Social Welfare Corporation Ichiko-kai After-School Day Service Heart Kid Tsuchiura Opening
Residential Paid Elderly Home Heart Living Kasama Opening
Social Welfare Corporation Ichiko-kai Support Facility for People with Disabilities Ichiten Tsukuba Mirai Opening
Care-Provided Paid Elderly Home Heart One Kasumigaura Building B Opening
Care-Provided Paid Elderly Home Heart One Higashi Ishioka Opening
Care-Provided Paid Elderly Home Heart One Hitachinaka Opening
Care-Provided Paid Elderly Home Heart One Tsukuba Mirai Opening
Care-Provided Paid Elderly Home Heart One Tamatsukuri Opening
The 16th internal training seminar was held at “Itten Kasumigaura” on June 13 and 26, 2025. President Kawashima gave a talk, followed by a lecture titled “Filial Piety and Loving People” by the representative chairman of Bando Taro Co., Ltd. Participants found the content highly valuable.
The Isshin Group held in-house training sessions on November 14 and 24, 2026. The well-attended sessions included long-service awards and online participation, as well as a talk by President Kawashima and a lecture on workplace organization.
The company held its entrance ceremony at Itten Kasumigaura on April 2, 2026. The 85 new employees included 80 international hires. Everyone at the company looks forward to their contributions.
Isshin Co., Ltd. held its 18th in-house training session at Itten Kasumigaura on May 14 and 29, 2026. After a talk by President Kawashima, Eri Tosaka, a gold medalist at the Rio Olympics, gave a lecture. The program was valuable for employees.
Isshin Co., Ltd. will participate in Childcare and Nursing Care WORK FES Saitama 2026, held at Sonic City on October 19, 2026. The event will include seminars and interviews and is expected to attract many participants. Application details are also provided.
Isshin Co., Ltd. will participate in welfare jobs consultation sessions held in Mito and Tsukuba on July 11 and 25, 2026. The first session begins at 10:30 a.m. on both days, with registration and interviews to follow. Venue and application details are also provided.
Isshin Co., Ltd. will participate in the Nursing Care Jobs and Individual Consultation Session to be held in Omiya on February 13, 2026. The venue is the basement level of the Sonic City Building. The event offers an opportunity to take a first step toward a career in welfare. Prospective attendees should check the application details.
Isshin Co., Ltd. will participate in the Tsukuba venue of the Ibaraki Jobs and Career-Change Fair, held at iias Tsukuba on December 7, 2025. The company will introduce itself and provide information sessions for job seekers. Those wishing to attend should check the application details.
Isshin Co., Ltd. will participate in the Nursing Care Jobs and Individual Consultation Session at the Ina venue in Saitama Prefecture on September 6, 2025. Attendees can speak directly with local nursing-care providers and receive career consultations. Prospective participants should check the application details.