diff --git a/lib/annotate_rb/model_annotator/annotation_diff_generator.rb b/lib/annotate_rb/model_annotator/annotation_diff_generator.rb
index bef8e9cf..95012e61 100644
--- a/lib/annotate_rb/model_annotator/annotation_diff_generator.rb
+++ b/lib/annotate_rb/model_annotator/annotation_diff_generator.rb
@@ -4,8 +4,9 @@ module AnnotateRb
   module ModelAnnotator
     # Compares the current file content and new annotation block and generates the column annotation differences
     class AnnotationDiffGenerator
-      HEADER_PATTERN = /(^# Table name:.*?\n(#.*\r?\n)*\r?)/
-      COLUMN_PATTERN = /^#[\t ]+[\w*.`\[\]():]+[\t ]+.+$/
+      HEADER_PATTERN = /(^# Table name:.*?\n(#.*\r?\n)*\r?)/.freeze
+      # COLUMN_PATTERN = /^#[\t ]+[\w\*\.`\[\]():]+[\t ]+.+$/.freeze
+      COLUMN_PATTERN = /^#[\t ]+[^\t ]+[\t ]+.+$/.freeze
 
       class << self
         def call(file_content, annotation_block)
diff --git a/spec/lib/annotate_rb/model_annotator/annotation_diff_generator_spec.rb b/spec/lib/annotate_rb/model_annotator/annotation_diff_generator_spec.rb
index 8449ed7d..f1882f8a 100644
--- a/spec/lib/annotate_rb/model_annotator/annotation_diff_generator_spec.rb
+++ b/spec/lib/annotate_rb/model_annotator/annotation_diff_generator_spec.rb
@@ -1,6 +1,8 @@
 # frozen_string_literal: true
 
 RSpec.describe AnnotateRb::ModelAnnotator::AnnotationDiffGenerator do
+  include AnnotateTestHelpers
+
   def test_columns_match_expected
     remove_whitespace = proc { |str| str.delete(" \t\r\n") }
 
@@ -142,5 +144,53 @@ class User < ApplicationRecord
         expect(subject.changed?).to eq(true)
       end
     end
+
+    context "when model file has existing annotations with column multi-byte comments" do
+      let(:annotation_block) do
+        klass = mock_class(:users,
+          :id,
+          [
+            mock_column(:id, :bigint, comment: "ID"),
+            mock_column(:active, :boolean, limit: 1, comment: "ＡＣＴＩＶＥ")
+          ],
+          [],
+          [])
+        options = AnnotateRb::Options.from({})
+        AnnotateRb::ModelAnnotator::AnnotationBuilder.new(klass, options).build
+      end
+
+      let(:file_content) do
+        <<~FILE
+          # == Schema Information
+          #
+          # Table name: users
+          #
+          #  id(ID) :bigint           not null, primary key
+          #
+          class User < ApplicationRecord
+          end
+        FILE
+      end
+
+      let(:current_columns) do
+        [
+          "#  id(ID)               :bigint           not null, primary key",
+          "# Table name: users"
+        ]
+      end
+      let(:new_columns) do
+        [
+          "#  id(ID)               :bigint           not null, primary key",
+          "#  active(ＡＣＴＩＶＥ) :boolean          not null",
+          "# Table name: users"
+        ]
+      end
+
+      it "returns an AnnotationDiff object with the expected old and new columns" do
+        test_columns_match_expected
+
+        expect(subject.changed?).to eq(true)
+      end
+    end
   end
 end