No.1 Sentai Gozyuger: Polar Beginning (ナンバーワン戦隊ゴジュウジャー ポーラー・ビギニング Nanbā Wan Sentai Gojūjā: Pōrā Biginingu) is a TTFCIcon-crosswiki-exclusive web special for No.1 Sentai Gozyuger.[2] It is a prequel to the series and explores Mashiro Kumade's backstory and origins.