my Tokyo Marathon result on Google Map
4 hours 4 minutes. I'm a little disappointed to say that I couldn't make sub-4. I couldn't run at even pace partly because a) strong wind b) my GPS watch couldn't take exact lap. It looks like GPS personal devices, whether Garmin or Globalsat, still don't work well in high rise area. And it may even be exacerbated by cloudy weather.
This is the official lap data taken from the chip on my shoes.
And this is the not-quite-accurate GPS data. If you zoom in to the green flag, which is Shinjuku area where there are so many high rises, you can see GPS data is quite off.
This is the official lap data taken from the chip on my shoes.
| Point | Lap |
| 5km | 28:54 |
| 10km | 27:50 |
| 15km | 27:32 |
| 20km | 26:40 |
| 25km | 26:03 |
| 30km | 29:06 |
| 35km | 31:07 |
| 40km | 32:13 |
| Finish | 14:28 |
And this is the not-quite-accurate GPS data. If you zoom in to the green flag, which is Shinjuku area where there are so many high rises, you can see GPS data is quite off.
