(last update 1999/05/11 : "??" means "to be confirmed")
| 1999/01/11-1999/01/12 | KEK | Collider Physics Meeting |
| 1999/02/15-1999/03/10 | CERN | OPAL at LEP2 |
| 1999/03/16 | KEK | JLCCAL Group Meeting |
| 1999/03/17-1999/03/18 | KEK | ACFA LCWG General Meeting |
| 1999/03/19 | KEK | Atlas-Japan Physics Meeting |
| 1999/03/28-1999/03/31 | Hiroshima | JPS annual meeting |
| 1999/04/25-1999/05/08 | CERN/Sitges | LCWS99 |
| 1999/06/02 | Tsukuba | JLCCAL Group Meeting |
| 1999/06/03 | Hamamatsu | Meeting with HPK |
| 1999/06/13-1999/0812 | CERN | OPAL at LEP2 |
| 1999/08/30-1999/09/30 | FNAL | JLCCAL beam test HpCAL (T912) |