function customize_admin_manage_posts_columns($columns) {
  $current_screen = get_current_screen();
  $is_block_screen = ($current_screen && $current_screen->id === 'edit-wp_block');

  // WordPress標準カラムを削除
  $remove_columns = [
    'author'     => !is_admin_list_author_visible(),
    'categories' => !is_admin_list_categories_visible(),
    'tags'       => !is_admin_list_tags_visible(),
    'comments'   => !is_admin_list_comments_visible(),
    'date'       => !is_admin_list_date_visible(),
  ];

  foreach ($remove_columns as $key => $condition) {
    if ($condition && isset($columns[$key])) {
      unset($columns[$key]);
    }
  }

  // 独自カラムを追加
  $add_columns = [
    'post-id'   => ['label' => __( 'ID', THEME_NAME )           , 'condition' => is_admin_list_post_id_visible()],
    'word-count'=> ['label' => __( '文字数', THEME_NAME )       , 'condition' => is_admin_list_word_count_visible()],
    'pv'        => ['label' => __( 'PV', THEME_NAME )           , 'condition' => is_admin_list_pv_visible() && !$is_block_screen],
    'thumbnail' => ['label' => __( 'アイキャッチ', THEME_NAME ) , 'condition' => is_admin_list_eyecatch_visible() && !$is_block_screen],
    'memo'      => ['label' => __( 'メモ', THEME_NAME )         , 'condition' => is_admin_list_memo_visible() && !$is_block_screen],
  ];

  foreach ($add_columns as $key => $data) {
    if (!empty($data['condition'])) {
      $columns[$key] = $data['label'];
    }
  }

  return $columns;
}