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| Director/General Service Division | 03(4519)5000 | 03(4519)5010 |
| River and Water Division | 03(4519)5001 | 03(4519)5011 |
| Highway Division | 03(4519)5002 | 03(4519)5012 |
| City Planning Division | 03(4519)5003 | 03(4519)5013 |
| Housing Division | 03(4519)5004 | 03(4519)5014 |
| Engineering Division | 03(4519)5005 | 03(4519)5015 |
| Information and Research Division | 03(4519)5006 | 03(4519)5016 |
| Intelligent Transport Systems Division | 03(4519)5007 | 03(4519)5017 |
JIS Q 9901-2000(
ISO9001:2000)
Date of Certification:17th June,1998
Renewed:20th May, 2004