About Us
Trade Name:
Address:
Phone:
Fax:
E-mail:
President:
Date of Establishment:
Capital:
Number of Employees:
Banks:
YAMAGUCHI MACHINERY CO., LTD.
28-8 Okishin-machi Sasebo-city Nagasaki-pref 857-1171 Japan
+81-956-20-1203
+81-956-20-1204
Shogo Minami
01 Jun. 1989
5 million JPY
41 (As of Dec. 2025)
The Bank of Fukuoka, Ltd.
The Juhachi‐Shinwa Bank, Ltd.
Main Customers:
NAVSUP FLCY Sasebo
Sasebo Heavy Industries Co., Ltd.
Iknow Machinery Co., Ltd.
Asahi Doryoku Kogyosho
Ariake Japan Co., Ltd.
Namura Marine Co.,Ltd.
YANMAR MARINE SYSTEM CO., LTD.
And many others
(in random order)
Business Items:
Overhaul of diesel engine and diesel generator.
Overhaul of loading equipment (cranes, boatdavits, rampways ) .
Overhaul of various valves (U/W valves, steam valves, and control valves, etc.)
Overhaul and install of various pumps (hydraulic pumps, pumps for high pressure fluids, etc.)
Regular inspections of boilers .
Repair and installation of deck planking.
Maintenance of freezers and refrigerators.
Plant construction
Relevant certifications,
qualifications and skills:
Construction Business License in Japan: Machine and Equipment Installation
ISO9001:2015 Certification
Agreement for Boat Repair (ABR) Holder
Shipyard Competent Person (Gas Free)
NACE Coating Inspector Level 1
Welding Qualification (NAVSEA S9074-AQ-GIB-010/248)
NDT Qualification (NAVSEA T9074-AS-GIB-010/271)