When it is 12:00 PM in Castro, it is 12:00 AM the next day in JST.
📞There is no overlap during standard 9-to-5 business hours, so a call may need to be early or late in the day for one side.
Castro is 12 hours behind JST.
🕐 Add 12 hours to Castro time to get JST time.
Castro uses 3 hours behind Universal Time (UTC-3) and JST uses 9 hours ahead of Universal Time (UTC+9).
| Castro Time | JST Time | |
|---|---|---|
| 12 AM Castro Time | ↔ | 12 PM JST Time |
| 1 AM Castro Time | ↔ | 1 PM JST Time |
| 2 AM Castro Time | ↔ | 2 PM JST Time |
| 3 AM Castro Time | ↔ | 3 PM JST Time |
| 4 AM Castro Time | ↔ | 4 PM JST Time |
| 5 AM Castro Time | ↔ | 5 PM JST Time |
| 6 AM Castro Time | ↔ | 6 PM JST Time |
| 7 AM Castro Time | ↔ | 7 PM JST Time |
| 8 AM Castro Time | ↔ | 8 PM JST Time |
| 9 AM Castro Time | ↔ | 9 PM JST Time |
| 10 AM Castro Time | ↔ | 10 PM JST Time |
| 11 AM Castro Time | ↔ | 11 PM JST Time |
| Castro Time | JST Time | |
|---|---|---|
| 12 PM Castro Time | ↔ | 12 AM JST Time |
| 1 PM Castro Time | ↔ | 1 AM JST Time |
| 2 PM Castro Time | ↔ | 2 AM JST Time |
| 3 PM Castro Time | ↔ | 3 AM JST Time |
| 4 PM Castro Time | ↔ | 4 AM JST Time |
| 5 PM Castro Time | ↔ | 5 AM JST Time |
| 6 PM Castro Time | ↔ | 6 AM JST Time |
| 7 PM Castro Time | ↔ | 7 AM JST Time |
| 8 PM Castro Time | ↔ | 8 AM JST Time |
| 9 PM Castro Time | ↔ | 9 AM JST Time |
| 10 PM Castro Time | ↔ | 10 AM JST Time |
| 11 PM Castro Time | ↔ | 11 AM JST Time |
Castro is 12 hours behind JST.
Castro is behind JST by 12 hours.
It is 9:00 PM in JST.