Update `Japanese` translation

Currently translated at 5.1% (28 of 540 strings)

Translation: Wiki-Bot/Discord
Translate-URL: https://weblate.frisk.space/projects/wiki-bot/discord/ja/

i18n/ja.json

@@ -1,44 +1,44 @@
 {
     "__translator": [
+        "7yultukuri7",
         "",
-        "",
-        "",
-        "",
-        "",
-        "",
-        "",
-        "",
-        "",
-        ""
+        " ",
+        " ",
+        " ",
+        " ",
+        " ",
+        " ",
+        " ",
+        " "
     ],
     "aliases": {
         "bug": [
             "",
-            "",
-            "",
-            "",
-            ""
+            " ",
+            " ",
+            " ",
+            " "
         ],
         "command": [
-            "",
-            "",
-            "",
-            "",
-            ""
+            "コマンド",
+            " ",
+            " ",
+            " ",
+            " "
         ],
         "diff": [
-            "",
-            "",
-            "",
-            "",
-            ""
+            "差分",
+            " ",
+            " ",
+            " ",
+            " "
         ],
         "discussion": [
-            "",
-            "",
-            "",
-            "",
-            ""
+            "ディスカッション",
+            " ",
+            " ",
+            " ",
+            " "
         ],
         "help": [
             "",