Kazuma Tsukumo Design . Appearance . Kazuma has dark tan skin , brown eyes , black spiky hair with a smaller version of Yuma ' s red hair and beard . He wears a hat , a green - like shirt and pants . Personality . Described as adventurous and hating " boring " things , Kazuma has a friendly and relaxed demeanor . He loves nothing more than the thrill of adventure and doesn ' t seek fame or money out of them . He was also the creator of Yuma ' s catchphrase and challenging spirit " kattobingu " ( ' Feeling the Flow ' in the dub ) . Kazuma also shown great intelligent and foresight , particularly concerning Yuma ' s destiny . Kazuma also appeared to like old - fashion things , evidenced by his classic style motorcycle and red car , as well as his house . A kind and loving husband and father , he always looks after his family , bravely sacrificing himself to save his wife or cheering up Yuma when he ' s sad . Kazuma keeps a picture of his family when off traveling , talks fondly of them to his friends . Kazuma values bonds and friendship , easily making friends with Byron Arclight and even risking his own life to save him . Dr . Faker revealed he also saw him as a friend . Kazuma ' s character causes him to well - respected by others , such as Charlie McCay , who considered him his " idol " and a man who had " everything " . Even as Vetrix , Arclight respected Kazuma , considering his ability to form friendships as both a strength and a weakness , which was passed to his son . Abilities . After falling into the Astral World , Kazuma displayed the ability to appear within the Emperor ' s Key . Kazuma can envelop himself in blue light , identical to that of Astral before he merges with Yuma using ZEXAL . This enables him to travel quickly . Using what remained of his powers , Kazuma was able to erect a barrier between the arena used by Yuma and Nash and the Astral World . Anime biography . History . Kazuma was an adventurer and the father of Kari Tsukumo and Yuma Tsukumo . Before setting off to the exploration of some ancient ruins with his wife , Mira Tsukumo , Kazuma gave his Deck to his son . They collected many Aztec and Inca artifacts over their travels , which they stored is an attic above Yuma ' s bedroom . When Yuma was younger , he took Yuma on a trip to cheer him up and to have a " man talk " . In the mountains , Kazuma taught Yuma about never - giving - up spirit , " Kattobingu " , and told him about the multidimensional worlds as well as revealing his dream to go to the end of the world . While traversing a snowy mountain , Kazuma , with his wife , saw a blinding light before the mountain began to break apart and he ended up falling off the cliff . To save Mira , Kazuma cut their rope since he knew Mira couldn ' t pull him up and would fall with him . On the verge of death , Kazuma encountered a being from the Astral World , and that being gave him the Emperor ' s Key and showed him the current crisis in the Astral World . Kazuma was rescued weeks afterwards and returned to his family with the key in hand . Sometime later , he also told Kari to be careful about Yuma ' s Duels , saying a great fate would awaken one day . Kazuma eventually gave the key to Yuma when he saw his son crying after losing a Duel . During his adventures , Kazuma attempted to find the door to parallel worlds and explored 23 ruins in his travels and left a " King ' s Coin " in each to prove he went to the dangerous ruins . His adventures earned him fame and was contacted by Dr . Faker and Byron Arclight , who were conducting research on the same subject . Kazuma agreed to help them , and after examining their theory , he told them what was wrong with it . Kazuma realized that they had been operating under the assumption that there were twenty - one passage points . Kazuma revealed that there were actually twenty - three passage points , something he had determined while on his journeys . With that new data , they determined where they needed to go to find where the door would appear next . On the way there , Byron and Kazuma bonded over their children , who all loved Dueling , with Byron saying Faker also has two sons . When they arrived , Kazuma saved Faker from being crushed by a boulder trap in the temple and lead them through ruins . Kazuma and Byron reach a dead end , with Faker remaining slightly behind them , the two began to glow red and Faker reads the hieroglyphs below their feet - " when two souls are offered up , the door will open " . In attempting to save Byron , Kazuma and Byron both fall through the portal and vanished . Kazuma ended up being trapped in the Astral World as a result , though many believed him to be dead . He encountered Astral and modified the algorithms programmed into him , and then sent him to Earth to meet his son . As Eliphas viewed what Kazuma did as treachery , he imprisoned Kazuma somewhere in Astral World . Yu - Gi - Oh ! ZEXAL . During Yuma ' s Duel with Trey , the latter used his crest ' s power to remove Yuma ' s memory of " " kattobingu " " so that he would have no more willpower to continue Dueling since he doesn ' t remember Kazuma teaching him " Kattobingu " . Somewhere in the middle of the Duel , Kazuma mysteriously appeared inside the Emperor ' s Key . He then used the key ' s power to recover Yuma ' s memories of his " " Kattobingu " " and recover his fighting spirit . After that , he yelled to Yuma to never forget what he taught him and then simply disappeared back to the Astral World . Later , he reappeared in front of Astral and requests he return to his son , then disappeared once again . Yu - Gi - Oh ! ZEXAL II . Astral revealed that Kazuma left a recorded message within the Different Dimension Airship that instructed Yuma and Astral to collect the seven " Mythyrian Number s " before the Barian s are able to obtain them . This was later proven to be done so that the true memories of the Seven Barian Emperors could be awakened at the cost of restoring Don Thousand ' s power . When Yuma journeyed to the Astral World and met Rainbow Kuriboh , the " Kuriboh " showed Yuma another recorded message from Kazuma , instructing his son to rescue Astral before he is executed . After Yuma Duel against Eliphas ended with his victory , Kazuma and Mira watched as Yuma and Astral left the Astral World from a cliff . Kazuma proudly commented that their son was able to change the world and how much he had grown . With knowledge that Yuma had " chosen " them , he called out to his son and cheered him on . During the Duel between Yuma and Nash , the Astral and Barian Worlds were close to colliding and destroying both . Kazuma appeared in the Astral World , while Vetrix appeared in the Barian World ( now fully fused with Earth ) . Kazuma thanked Vetrix , saying that his sons had helped Yuma grow into a fine young man . Vetrix thanked him in turn , as Yuma helped him get his family back . Vetrix determined they had to find a way to stabilize the worlds long enough for the Duel to come to its conclusion . Kazuma agreed , and the two entered energy forms of the same colors used by Yuma and Astral before using ZEXAL . They used the last of their powers to become barriers between the arena and the two colliding worlds . An image of the Emperor ' s Key shined out as Kazuma used these powers . After the Duel ' s end , Kazuma and Vetrix reappeared , with Kazuma thanking Vetrix for his help and calling him " old friend " . Vetrix mused that he had repaid some of the debt that his earlier actions had left him with before vanishing . Later , Kazuma appeared in the Emperor ' s Key and spoke with Astral , who was preparing to face Yuma in a Duel . Kazuma said that Astral did well in protecting Yuma since he sent him back to his son , just as he thought he would . He praised all the marvels they had done , but Astral said he still had a duty to use the Numeron Code . Kazuma told him he wouldn ' t interfere , knowing Astral would chose a good future for everybody . When Astral asked if everything really went as Kazuma wanted it to , Kazuma replied that he wasn ' t sure about that and asked if Astral really intended to fight Yuma , which the latter insisted he would do so with all his strength . After Yuma ' s and Astral ' s final Duel , Kazuma and Mira returned to Earth , having resumed their adventuring . They were last seen exploring a canyon together . Deck . Kazuma played a Syllable Deck . He was only shown Dueling with Yuma during one of Yuma ' s flashbacks . After a few attacks , he tried to Xyz Summon using " Gogogo Golem " and " Ganbara Knight " , but failed since he didn ' t have any Xyz Monster s . Later , he left Yuma the Deck , which the latter began to use in place of his original Deck .