| Otaru Westville | South Africa Standard Time | 07:00 |
| Otaru Wilderswil | Central European Time | 07:00 |
| Otaru Wetaskiwin | Mountain Time | 15:00 |
| Otaru Wiesbaden | Central European Time | 07:00 |
| Otaru West Windsor Township | Eastern Time | 13:00 |
| Otaru Wieselburg | Central European Time | 07:00 |
| Otaru Westborough | Eastern Time | 13:00 |
| Otaru Zermatt | Central European Time | 07:00 |
| Otaru Venezia | Central European Time | 07:00 |
| Otaru Zeven | Central European Time | 07:00 |
| Otaru Venice | Central European Time | 07:00 |
| Otaru Zero Branco | Central European Time | 07:00 |
| Otaru Ventnor City | Eastern Time | 13:00 |
| Otaru Zephyr | Eastern Time | 13:00 |
| Otaru Whitby | United Kingdom Time | 08:00 |
| Otaru Zephyrhills | Eastern Time | 13:00 |
| Otaru Whitby | Eastern Time | 13:00 |
| Otaru Whitchurch | United Kingdom Time | 08:00 |
| Otaru White City | Pacific Time | 16:00 |
| Otaru White Hall | Central Time | 14:00 |
| Otaru White Lake charter Township | Eastern Time | 13:00 |
| Otaru Wexford | Ireland Time | 08:00 |
| Otaru Wexford | Eastern Time | 13:00 |
| Otaru Whalley | United Kingdom Time | 08:00 |
| Otaru Whanganui | New Zealand Time | -03:00 |
| Otaru Wheatley | Central Time | 14:00 |
| Otaru Wheaton-Glenmont | Eastern Time | 13:00 |
| Otaru Whitefish | Mountain Time | 15:00 |
| Otaru Whiteman Air Force Base | Central Time | 14:00 |
| Otaru Whitesboro | Eastern Time | 13:00 |
| Otaru Whiteville | Eastern Time | 13:00 |
| Otaru Whitewater | Central Time | 14:00 |
| Otaru Yunquera de Henares | Central European Time | 07:00 |
| Otaru Yuo | West Africa Time | 08:00 |
| Otaru Yvoir | Central European Time | 07:00 |
| Otaru Yzeure | Central European Time | 07:00 |
| Otaru Zachary | Central Time | 14:00 |
| Otaru Zahara de los Atunes | Central European Time | 07:00 |