Add mochizuki875 into OWNERS file

Also, aligned in alphabetic order.

Author: shu-mutou

japan/OWNERS

@@ -2,25 +2,26 @@
 
 reviewers:
   - atoato88
-  - nasa9084
+  - inductor
   - mkimuram
+  - mochizuki875
+  - nasa9084
+  - Okabe-Junya
   - shu-mutou
-  - YuikoTakada
   - ziyi-xie
-  - Okabe-Junya
-  - inductor
 approvers:
   - atoato88
-  - nasa9084
+  - inductor
   - mkimuram
+  - mochizuki875
+  - nasa9084
+  - Okabe-Junya
   - shu-mutou
-  - YuikoTakada
   - ziyi-xie
-  - Okabe-Junya
-  - inductor
 emeritus_approvers:
   - k-toyoda-pi
   - oomichi
   - s-ito-ts
   - s-kawamura-w664
   - t-inu
+  - YuikoTakada