Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Wrestler | Reign | Days held | Location | Event |
| --- | --- | --- | --- | --- |
| Filoso | 1 | Unknown | N/A | Live event |
| Osamu Namiguchi | 1 | 7 | Nagano , Japan | Live event |
| Katsuhiko Nakajima | 1 | 297 | Hiroshima , Japan | Live event |
| Tatsuhito Takaiwa | 1 | 8 | Tokyo , Japan | Live event |
| Vacated | — | — | N/A | N/A |
| The★ZEST | 1 | 261 | Yamagata , Japan | Live event |
| NOIZ | 1 | 2127 + | Tokyo , Japan | Miracle Rocket ~2nd Impact~ |
Question:
What event has unknown as the days held.?
Answer:
Live event