Ask HN: What is the best cloud region to serve Japan and Australia?

Currently we have two web servers that serve America and Europe. The servers are at East US and Ireland, they are shown as blue dots in the map:

https://imgur.com/a/IboyDCu

This simple configuration serves us well. However, Japan and Australia turned out to be very lucrative markets for us. If you take a closer look at the provided map, you'll see that those locations have a lot of red dots indicating some uncomfortable latency > 200 ms.

What is the best location for a third web server to serve Japan and Australia well?

The list of available regions to choose from: https://imgur.com/a/YXxRxrY

Southeast Asia region looks like a natural choice, but maybe someone has deeper experience with that area?