Forex Timezone

I need to know what is the exact timezone for UK, US and Asean session. I found out there is a few type of answer in the market. Some telling me Asean end at 0200EST and some tells that Asean end at 0400EST.

Need an exact value.

I found this site, but is it someone can clarify for me is it that is the correct version?

http://www.forexmarkethours.com/

Thanks.... Really confuse for this since a while ago...

I live in japan, Topix opens and closes from 9am to 5pm.
The site above says from 8 to 4, i had to add 1 hour.
It seens to be not accurate