Horie Yui events (1999)
Some of the events that Yui has appeared in during the year 1999 are as follows.
| 1999.09.17 | Tokyo Game Show 99 Autumn [business day] |
| 1999.09.18 | Tokyo Game Show 99 Autumn |
| 1999.09.19 | Tokyo Game Show 99 Autumn |
| 1999.09.23 | KSS Group Fan Kansha Day |
| 1999.10.24 | Nowanchatte Say You public recording event |
| 1999.11.21 | Yuukyuu Ongakusai |