Not really - my experience with walking around akihabara is that, while the selection of (especially Pentax) bodies and lenses is awesome, their prices are not awesome. It's cheaper in most cases to just buy from SG or HK.
You can try malaysia too. Shops in Angsana Plaza. Should be 3 shops in total if I'm not wrong. Just do your homework, and consider the exchange rate beforehand. Good luck!