update Japanese team member list

Change-Id: I760a7731435dc076d5ec1400f2e5636c33a2481e

tools/zanata/translation_team.yaml

@@ -101,6 +101,7 @@ ja:
     - otsuka
     - hidekazuna
     - to222
+    - ken_ishii
     - sasukeh
     - macjack
     - mariojv
@@ -111,6 +112,7 @@ ja:
     - adocmember
     - noriko
     - yuanying
+    - sakaryo
     - sayako
     - ststake
     - shinya_kwbt
@@ -119,13 +121,16 @@ ja:
     - makita
     - tjcocozz
     - fifieldt
+    - tomoki_amano
     - tomono_n
     - tsutomu_kimura
     - yeguchi
+    - yukinori_yagisawa
     - ykatabam
     - yogawa
     - yusuke1219
     - yuta_hono
+    - riku_kobane
     - masami_sasahara
   reviewers:
     - amotoki