| Company Name | Sanyu Co.,Ltd. |
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| Address |
 Head Office and Main Factory-
457 Baba-cho, Hitachi Ota City, Ibaraki Prefecture 313-0004 Japan
TEL：0294-72-2245
FAX：0294-73-0459
 Branch Factory- 2-43-10 Ishinazaka-cho, Hitachi City, Ibaraki Prefecture 319-1225 Japan
TEL：0294-53-2727
FAX：0294-53-2729
 Technology Center- 2-43-4 Ishinazaka-cho, Hitachi City, Ibaraki Prefecture 319-1225 Japan
TEL：0294-33-9931
FAX：0294-33-9932
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| Establishment | September 1946 |
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| Capitals | 45 million Yen |
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| Directors |
- President and CEO Katogi Katsuya
- Director Yanagibashi Masahiro
- Director Katogi Michiko
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| Employee | 160 persons |
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| Businesses |
- ・Production of electron microscope-related accessories
- ・Production of a semiconductor failure analyses tool
- ・Precision machinery processing
- ・Manufacturing products related to analyzers
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| Corresponding banks |
- Joyo Bank
- Tsukuba Bank
- Japan Finance Corporation
- Shokochukin Bank
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| Major customers |
- Hitachi High-Technologies Corporation
- Hitachi High-Tech Manufacturing & Service Corporation
- Hitachi High-Tech Solutions Corporation
- Hitachi High-Tech Science Corporation
- Hitachi High-Tech Fielding Corporation
- Hitachi, Ltd.
- Renesas Electronics Corporation
- National Institute of Advanced Industrial Science and Technology
- National Institute for Materials Science
- The University of Tokyo
- Hokkaido University
- Ibaraki University
- Tokai University
- Chiba Institute of Technology
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