Hrm. I can see a couple issues, but i can't see why OCSP stapling isn't working. 
Are you sure Nginx has been reloaded since the configuration was modified? Is there anything notable in Nginx's error.log?
That lands on the default HTTPS vhost. You may want to use "openssl s_client -connect kazeuraki.net:443 -servername kazeuraki.net -status", but in this case it doesn't seem to matter either way.
Only one of those server blocks has stapling enabled. But it doesn't seem to be working on either of them, so that doesn't seem relevant either.
Nonetheless, you should probably synchronize the SSL settings in the two server blocks, or move them up to the http level.