Unbreakable Heart

Unbreakable Heart (折れないハート Orenai Hāto) is the fourth Japanese opening theme of the Yu-Gi-Oh! ZEXAL anime, performed by Takatori Hideaki. It debuted on October 7th 2012.

Like the previous openings, the images of this opening change from time to time:
 * Episode 75 - Gilag and Chaos Xyz: Machine-Armored Djinn, Engeneral are no longer covered in shadows.
 * Episode 77 - Hot-Blooded Instructor King, Giantrainer and Chaos Xyz: Hot-Blooded Instructor God, Ultimatrainer are no longer covered in shadows.

Kanji
いまはじまるのさ ずっと胸に描き続けてたＳｔｏｒｙ この想い　タ・ギ・レ！

戦う準備はできている 震える胸耳を済まして ずっとそのときを待っている 負けることもあったけど そのたびにまた立ち上がれた また強くなれた 信じればいいさ 今までよりも゛いま゛を 限界なんてもん ゆうに越えろ

いまはじまるのさ ずっと胸に描き続けてたＳｔｏｒｙ この想い　タ・ギ・レ！

この手にある 切り札を強く握りしめて 折れないハートで　夢に向かうんだ！

Kana
いまはじまるのさ ずっとむねにえがつづけてたストーリー このおもい　タ・ギ・レ！

たたかうじゅんびはできている ふるえるむねみみをすまして ずっとそのときをまっている まけることもあったけど そのたびにまたたちあがれた またつよくなれた しんじればいいさ いまでよりも゛いま゛を げんかいなんてもん ゆうにこえろ

いまはじまるのさ ずっとむねにえがつづけてたストーリー このおもい　タ・ギ・レ！

このてにある きりふだつよくにぎりしめて おれないハートで　ゆめにむかうんだ

Romaji
Ima hajimaru no sa Zutto mune ni egaki tsudzuketeta sutōrī Kono omoi ta-gi-re!

Tatakau junbi wa dekiteiru Furueru mune mimi wo sumashite Zutto sono toki o matteiru Makeru koto mo atta kedo Sono tabi ni mata tachiagareta Mata tsuyokunareta Shinjireba ii sa Ima made yori mo "ima" o Genkai nantemon Yū ni koero

Ima hajimaru no sa Zutto mune ni egaki tsudzuketeta sutōrī Kono omoi ta-gi-re!

Kono te ni aru Kirifuda o tsuyoku nigirishimete Orenai hāto de yume ni mukaunda!

Characters

 * Astral
 * Yuma Tsukumo
 * Reginald Kastle
 * Kite Tenjo
 * Hart Tenjo
 * Rei Shingetsu
 * Orbital 7
 * Rio Kastle
 * Tori Meadows
 * Bronk Stone
 * Caswell
 * Flip
 * Cathy Catherine
 * Anna Kaboom
 * Haru Tsukumo
 * Kari Tsukumo
 * Mr. Kay
 * Gilag
 * Misael
 * Alit
 * Durbe
 * Spencer
 * Kaze
 * Roku
 * Lilly
 * Sei
 * Sachi

Card Appearance

 * Big Jaws
 * Black Ray Lancer
 * Deep Sweeper
 * Gagaga Clerk
 * Gagaga Girl
 * Gagaga Magician
 * Ganbara Knight
 * Gogogo Golem
 * Hammer Shark
 * Neo Galaxy-Eyes Photon Dragon
 * Number 6: Chronomaly Atlandis
 * Number 9: Dyson Sphere
 * Number 17: Leviathan Dragon
 * Number 83: Galaxy Queen
 * Number 92: Fake-Body God Dragon, Heart-eartH Dragon
 * Number 96: Dark Mist
 * Number C32: Shark Drake Veiss
 * Number C39: Utopia Ray
 * Photon Leo
 * Photon Thrasher

Monster Appearance

 * Achacha Archer
 * Achacha Chanbara
 * Acorno
 * Baby Tiragon
 * Bull Blader
 * Chaos Xyz: Machine-Armored Djinn, Engeneral
 * Chaos Xyz: Hot-Blooded Instructor God, Ultimatrainer
 * Chaos Xyz: Saimon, the Disciplinary High Priest
 * Dododo Warrior
 * Flelf
 * Gagaga Clerk
 * Gagaga Gardna
 * Gagaga Caesar
 * Gagaga Magician
 * Ganbara Knight
 * Goblindbergh
 * Gogogo Gigas
 * Hot-Blooded Instructor King, Giantrainer
 * Joe the Pixie
 * Kurivolt
 * Melomelody the Brass Djinn
 * Mogmole
 * Muzurhythm the String Djinn
 * Neo Galaxy-Eyes Photon Dragon
 * Number 7: Lucky Straight
 * Number 10: Illumiknight
 * Number 11: Big Eye
 * Number 16: Shock Master
 * Number 17: Leviathan Dragon
 * Number 19: Freezerdon
 * Number 20: Giga-Brilliant
 * Number 25: Force Focus
 * Number 34: Terror-Byte
 * Number 61: Volcasaurus
 * Number 69: Heraldry God - Coat of Arms
 * Number 88: Gimmick Puppet - Destiny Leo
 * Number 107: Galaxy-Eyes Spacia-Time Dragon
 * Number C32: Shark Drake Veiss
 * Number C39: Utopia Ray
 * Pinecono
 * Stinging Swordsman
 * Tasuke Knight
 * Temtempo the Percussion Djinn
 * ZW - Lion Arms
 * Several Unknown Monster Cards

Trivia

 * "Hot-Blooded Instructor King, Giantrainer" is grouped along with other monsters behind Barians and the "Chaos Xyz" monsters since this monster supports the archetype.