Overview
Services

SANKI SERVICE CORPORATION

Sanki Service Corporation provides comprehensive building maintenance solutions for multi-location operators such as retail chains, restaurants, and commercial facilities, covering HVAC, kitchen equipment, electrical systems, and plumbing/sanitation facilities. The company operates a 24/7 call center system with locations in Japan (Tokyo and Himeji) and Shanghai, China, supported by maintenance engineers and a nationwide partner network across 16 domestic bases. In addition to routine and preventive maintenance, the company offers energy-saving solutions including inverter retrofits, LED lighting, SEMS (Store Energy Management Systems), and equipment renewal/renovation works.

Market Cap
US$78.0M
¥12.5B
EV
US$61.3M
¥9.78B
StockUS$12.09(¥1,930)▲+1.31%
US$1 = ¥159.70 (2026-11-12)
LTM EV/EBITDA
6.7
x
LTM EV/EBIT
7.1
x
LTM PER
12.7
x
LTM PBR
2.2
x
Stock vs TOPIX (1Y, base=100)vs TOPIX ▼-33.5%pt
100
Nov 13, 25 – Nov 13, 26StockTOPIX
MC → EV Bridge
US$78.0M¥12.5BMarket CapUS$1.72M¥0.27B+ DebtUS$15.7M¥2.50B− CashUS$2.76M¥0.44B− Inv. Sec.US$61.3M¥9.78BEV
AI Briefing
Sanki Service delivers 24/7 multi-site building maintenance (HVAC, kitchen, electrical, plumbing) to major retail/food chains, backed by 16 domestic bases and a Shanghai call center. FY26/5 revenue US$152M (¥24.3B) with OP margin steady near 4.8-4.9%, continuing multi-year growth alongside an expanding energy solutions offering. Ownership is concentrated among founder-linked holders (Nakajima family and affiliates) plus financial investors including Mitsuzen Communications' investment vehicle, a structure worth watching for capital allocation and governance implications.
Performance & Balance
Revenue 5Y (US$)
US$72.5M¥11.6B'22/5US$92.3M¥14.7B'23/5US$122M¥19.4B'24/5US$129M¥20.6B'25/5US$152M¥24.3B'26/5
EBITDA 5Y (US$)
US$2.18M¥0.35B'22/5US$4.39M¥0.70B'23/5US$5.50M¥0.88B'24/5US$7.12M¥1.14B'25/5US$7.84M¥1.25B'26/5
Net Income 5Y (US$)
US$0.96M¥0.15B'22/5US$2.83M¥0.45B'23/5US$2.92M¥0.47B'24/5US$4.31M¥0.69B'25/5US$5.34M¥0.85B'26/5
Capital Structure
95%
EquityD/E 0.05xDebt
Liquidity vs Debt 5Y (US$)▲ Net Cash
CashInv. Sec.Debt
US$11.8M¥1.88BUS$1.94M¥0.31B'22/5US$10.8M¥1.72BUS$5.22M¥0.83B'23/5US$14.7M¥2.34BUS$4.48M¥0.72B'24/5US$17.6M¥2.81BUS$2.98M¥0.48B'25/5US$17.3M¥2.77BUS$2.15M¥0.34B'26/5
Business Segments
2026/05 · US$ (¥B)
89%
Maintenance services
Revenue
US$136M(¥21.7B)
Segment profit
US$6.70M(¥1.07B)4.9%
11%
Construction-related Products and Services
Revenue
US$16.2M(¥2.59B)
Segment profit
US$0.65M(¥0.10B)4.0%
Adjustments
Revenue
-US$0.22M(¥-0.03B)
Segment profit
-US$0.02M(¥-0.00B)
No segment changes in the last 5 years
Shareholders
Top 10 hold 64.2%
1
Nakajima Sangyo Co., Ltd.
15.11%
2
Shin Maint Holdings Co.,Ltd.
9.76%
3
UHPartners 2 Investment Limited Partnership
6.90%
4
Yoshikane NAKAJIMA
6.59%
5
Hikari Tsushin KK Investment Limited Partnership
5.87%
6
Ryoko NAKAJIMA
5.34%
7
UHPartners 3 Investment Limited Partnership
3.96%
8
Yuki NAKAJIMA
3.62%
9
SANKI SERVICE CORPORATION Employee Stock Ownership Association
3.52%
10
Kaoruko NAKAJIMA
3.49%
Management
9 officers
Yoshikane NAKAJIMA
Representative Director, Chairman
Jul 1977 Company founded; Representative Director, President Aug 1998 Established Shanghai Sanki Building Equipment Maintenance Co., Ltd.; Chairman of the Board Jun 2020 Director, Chairman Jan 2021 Representative Director, Chairman (current) Aug 2025 Director, Shanghai Sanki Building Equipment Maintenance Co., Ltd. (current)
1954-11-14
Reona OCHI
Director and Vice President
Apr 1993 Joined the Company Oct 2001 General Manager, Sales Department, Tokyo Business Development Division Apr 2002 Manager, Technical Management Office, Tokyo Business Development Division Apr 2005 Head of Call Center Jun 2008 Executive Officer, Head of Call Center Apr 2010 Executive Officer, General Manager, Tokyo Service Department Mar 2012 General Manager, Shanghai Sanki Building Equipment Maintenance Co., Ltd. Sep 2012 Director, Shanghai Sanki Building Equipment Maintenance Co., Ltd. Jun 2015 Executive Officer, Head of Total Maintenance Division Aug 2015 Director, Head of Total Maintenance Division Jun 2017 Director, Head of Maintenance Division Jun 2019 Director, Head of Business Division Aug 2020 Senior Director, Future Project Office Jan 2021 Managing Executive Officer, Head of Business Division Aug 2021 Director, Managing Executive Officer, Head of Business Division Jun 2022 Director, Shanghai Sanki Building Equipment Maintenance Co., Ltd. (current) Aug 2024 Director and Vice President, Head of Business Division (current)
1975-02-08
Osamu KAWASAKI
Senior Managing Director
Apr 1999 Joined Kogin Lease Co., Ltd. (now Mizuho Leasing Company, Limited, Mizuho Financial Group) Mar 2015 Joined Leans Group; Director, General Manager of Finance Department, General Manager of Human Resources and General Affairs Department, and General Manager of Corporate Planning Office Aug 2019 Joined the Company; General Manager, General Affairs and Human Resources Department Jun 2020 Executive Officer, General Manager, Human Resources Strategy Department; Audit & Supervisory Board Member, Shanghai Sanki Building Equipment Maintenance Co., Ltd. (current) Jun 2022 Managing Executive Officer, General Manager, Management Administration Division and Human Resources Strategy Department Aug 2022 Director, Managing Executive Officer, General Manager, Management Administration Division and Human Resources Strategy Department Feb 2024 Director, Managing Executive Officer, General Manager, Management Administration Division, Human Resources Strategy Department and Accounting and Finance Department Aug 2024 Senior Managing Director, General Manager, Management Administration Division, Human Resources Strategy Department and Accounting and Finance Department Jun 2025 Senior Managing Director, General Manager, Management Administration Division, Human Resources Strategy Department and Legal Department (current) Dec 2025 Director, Sanki Next Repair Co., Ltd. (current)
1975-06-30
Noriaki MASAKI
Director
Apr 1972 Joined Nikken Sekkei Civil Engineering Ltd. (now Nikken Sekkei Ltd.), Civil Engineering Design Office May 1989 General Manager, Survey Department, Civil Engineering Office, Nikken Sekkei Civil Engineering Ltd. Apr 1991 General Manager, Design Department, Civil Engineering Office Apr 1995 General Manager, Operations Department, Civil Engineering Office Oct 1999 General Manager, Tokyo Business Development Department, Head Office Mar 2004 Representative Director, President, Nikken Sekkei Civil Engineering Ltd. Apr 2005 Senior Executive Officer, Nikken Sekkei Ltd. Jan 2006 Managing Director, Nikken Sekkei Research Institute Ltd. Jan 2011 Advisor, Nikken Sekkei Ltd. Jan 2018 Senior Advisor, Urban Building Certification Center Co., Ltd. Jul 2020 Director, Urban Building Certification Center Co., Ltd. Jan 2023 Special Advisor, Nikken Sekkei Research Institute Ltd. Aug 2023 Director of the Company (current)
1947-12-07
Hiromi FUJITA
Director
Apr 1978 Joined Fuji Electric Instrumentation Co., Ltd. Apr 1983 Joined Bell System 24, Inc. Jun 1987 Joined Moshimo Hotline Inc. (now Altius Link Inc.); General Manager, Operations Department Jun 1991 General Manager, Training Department Jun 1993 General Manager, Planning and Sales Promotion Department Jun 1996 General Manager, Planning and Sales Promotion Department and General Manager, Training Department Jun 1999 Director, Moshimo Hotline Inc. Jun 2004 Director, Executive Officer, Moshimo Hotline Inc. Jun 2008 Director, Senior Executive Officer, Moshimo Hotline Inc. Aug 2009 Representative Director, J-Sol Co., Ltd. (current) Aug 2023 Director of the Company (current)
1955-05-12
Ryoko NAKAJIMA
Director
May 2006 Joined RK Corporation Co., Ltd. May 2008 Joined Grand Clair Co., Ltd. Mar 2010 Assistant Store Manager, Revi Crie Ikebukuro, Grand Clair Co., Ltd. May 2011 Opened beauty salon One's Diamond Sep 2017 Joined the Company (current) Jul 2023 Head of Roppongi Area, Shinseikai Women Business Owners Community (current)
Makoto KAIBA
Full-time Audit & Supervisory Board Member
Apr 1982 Joined Sanwa Bank, Ltd. (now MUFG Bank, Ltd.) Jan 2002 Branch Manager, Shin-Osaka Station Branch, and General Manager, Corporate Sales Department, MUFG Bank Apr 2005 Branch Manager, Kyoto Station Branch, and General Manager, Corporate Sales Department, MUFG Bank Jul 2007 General Manager, Retail Human Resources Department, MUFG Bank Feb 2010 General Manager, Osaka Sales Department, MUFG Bank Jun 2012 Joined Toyo Carmax Co., Ltd.; Manager, Petroleum Sales Department No. 2 Jun 2013 Executive Officer, Petroleum Sales Department No. 2, Toyo Carmax Co., Ltd. Jun 2016 Managing Director, General Manager, General Affairs and General Manager, Accounting, Toyo Carmax Co., Ltd. Jun 2019 Senior Managing Director, in charge of General Affairs, Accounting and Systems, Toyo Carmax Co., Ltd. May 2020 Trustee, Momoyama Gakuin School Corporation (current) Jul 2022 Joined the Company; Manager, Management Administration Division Aug 2022 Audit & Supervisory Board Member of the Company (current)
1959-04-10
Akira KITAOKA
Audit & Supervisory Board Member
Apr 1980 Joined Nikko Securities Co., Ltd. (now SMBC Nikko Securities Inc.) Sep 1985 Joined Akamatsu Tax Accountant Office Sep 1988 Joined Nakayama Tax Accountant Office Apr 1992 Established Kitaoka Tax Accountant Office; Head (current) Aug 2007 Audit & Supervisory Board Member of the Company (current)
1957-08-12
Masakazu OGINO
Audit & Supervisory Board Member
Oct 2002 Registered as attorney-at-law Nov 2006 Head, Tatsuno Himawari Fund Law Office Mar 2011 Head, Tatsuno Law Office (current) Apr 2015 Vice President, Hyogo Bar Association Aug 2015 Audit & Supervisory Board Member of the Company (current) Jun 2023 Director (Audit and Supervisory Committee Member), Kawase Computer Supplies Co., Ltd. (current)
1977-12-10
Large Shareholding Reports
Shinmente Holdings Co., Ltd.
2025-10-31
8.28%→9.31%
Annual report (as of 2026-05-31): 9.76%
UH Partners 2 Co., Ltd.
2025-09-29
6.76%→6.76%
Shinmente Holdings Co., Ltd.
2025-09-04
7.28%→8.28%
Annual report (as of 2026-05-31): 9.76%
Disclosures
No disclosures
Primary Source Filings
TDnet
2026-10-15
Q1 Earnings Flash
FY ending May 2027
EDINET
2026-08-27
Annual Securities Report
Period: Jun 2025 – May 2026
TDnet
2026-08-07
株主総会招集通知
TDnet
2026-07-15
Full-Year Earnings Flash
FY ending May 2026
TDnet
2026-04-14
Q3 Earnings Flash
FY ending May 2026
EDINET
2026-01-14
Semi-Annual Securities Report
Period: Jun 2025 – May 2026
EDINET
2025-10-31
Large Shareholding Report
TDnet
2025-10-15
Q1 Earnings Flash
FY ending May 2026
EDINET
2025-09-29
Large Shareholding Report
EDINET
2025-09-04
Large Shareholding Report
EDINET
2025-08-29
Annual Securities Report
Period: Jun 2024 – May 2025
TDnet
2025-04-11
Q3 Earnings Flash
FY ending May 2025
EDINET
2025-01-14
Semi-Annual Securities Report
Period: Jun 2024 – May 2025
TDnet
2024-10-15
Q1 Earnings Flash
FY ending May 2025
EDINET
2024-08-29
Annual Securities Report
Period: Jun 2023 – May 2024
EDINET
2024-04-12
Quarterly Securities Report
Period: Dec 2023 – Feb 2024
EDINET
2024-01-12
Quarterly Securities Report
Period: Sep 2023 – Nov 2023
EDINET
2023-10-13
Quarterly Securities Report
Period: Jun 2023 – Aug 2023
EDINET
2023-08-28
Annual Securities Report
Period: Jun 2022 – May 2023
EDINET
2023-04-14
Quarterly Securities Report
Period: Dec 2022 – Feb 2023
EDINET
2023-01-13
Quarterly Securities Report
Period: Sep 2022 – Nov 2022
EDINET
2022-10-13
Quarterly Securities Report
EDINET
2022-08-29
Annual Securities Report
EDINET
2022-04-14
Quarterly Securities Report
EDINET
2022-01-14
Quarterly Securities Report
EDINET
2021-10-13
Quarterly Securities Report
EDINET
2021-08-30
Annual Securities Report
EDINET
2021-04-14
Quarterly Securities Report
EDINET
2021-01-14
Quarterly Securities Report
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