Sumokoin is japanese should on asian exchange but right is not
are the dev doing something for this ?
No. As dev said lots of times before they don't want the coin on more exchanges. Two is just fine. Forever.
Excuse me? You yourself mentioned a few days ago that the coin has been accepted on Bittrex, Poloniex, Binance and Kraken:
Sumo is accepted on Bittrex, Poloniex, Binance and Kraken. They just try to go live on exactly the same time. After they figured that out, the announcements will come