Ohtsuka watches

I spotted these watches on a recent trip back to Malaysia. It was being sold in a sports shop. I don't really know much about the watches. I figure since they were being sold in sports shops, their target market are sportsmen (?). I did not  look at the prices but I suspect they would not be that expensive. 

Anyway, the watches offer pretty much the basic functions you would expect from watches in this category. You have the time, auto-calendar (date, month, day, week), 1/100 chronograph with split function and EL backlight. I am not sure about the water resistance rating.

It is fitted with Japanese movement.

I don't think the sensor thing works but I could be wrong.