try create a database

initdb.d/10-wanikani.sql

@@ -0,0 +1,15 @@
+CREATE TABLE "wanikani.subjects" (
+  "id"          INT PRIMARY KEY NOT NULL,
+  "updatedAt"   TIMESTAMPTZ NOT NULL,
+  "object"      TEXT NOT NULL,
+  "url"         TEXT NOT NULL,
+  "data"        JSONB NOT NULL
+);
+
+CREATE INDEX "idx_wanikani.subjects_object" ON "wanikani.subjects" ("object");
+CREATE INDEX "idx_wanikani.subjects_data" ON "wanikani.subjects"
+  USING pgroonga("data")
+  WITH (
+    tokenizer='TokenMecab',
+    normalizer='NormalizerNFKC100("unify_kana", true)'
+  );