Off the top of my head: Indra Das (The Devourers forthcoming from Penguin in 2016 I think? and a lot of short fiction published under Indrapramit Das), Vandana Singh (The Woman who Thought she was a Planet and Other Stories), Anil Menon (The Beast with Nine Billion Feet), Samit Basu (Gameworld trilogy which starts with the Simoqin Prophecies and is available on Kindle), Usman Malik (lots of short fiction), Kuzhali Manickavel, Vajra Chandrasekera. I'm sure there's a lot more (and a lot of it, as with the other places in Asia, isn't published and marketed as genre specifically but has a lot of genre elements? Definitions are... different there, if it makes sense?).

You can also check out Lavie Tidhar's Book of World SF series which has a lot of short fiction (it focuses on authors outside the Anglophone world, and there's a fair bit of Asians in there).