Kanto Summer AM 2025

Inside Ota Ward Plaza on August 30, 2025, the competition hall buzzed with focused energy as 84 speedcubing competitors gathered under the bright venue lighting. Inspection timers flashed across the tables, plastic pieces clicked in relentless cadence, and judges watched hands move through fingertricks in absolute silence. The compact morning schedule in Ota, Tokyo, Japan brought a dedicated lineup of solvers ready to push their personal benchmarks across two classic events.

Speed cubing tests precision and dexterity across various formats, demanding subtle fingertricks and total command over turning mechanics. Mastery of the standard Rubik's Cube requires an intricate balance of lookahead and ergonomic efficiency, where a single mistimed flick can alter the flow of an entire solve. At Kanto Summer AM 2025, that mechanical discipline was on full display throughout every station in the room, proving how technical mastery transforms simple turns into fluid speed.

In the flagship 3x3x3 Cube contest, 79 competitors lined up across two rounds of intense competition to decide the overall title. Kantaro Sakamoto produced the standout run of the morning, taking first place with a winning average of 7.03 seconds alongside a best single of 6.03 seconds. Yoshiki Ando secured second place on the podium with an average of 7.94 seconds, while Sho Ogata claimed third place with an average of 8.35 seconds to round out the 3x3 results.

The 2x2x2 Cube event brought quick-fire action across its two rounds as 68 competitors tackled the miniature puzzle. Wataru Takamiya captured the championship with a blistering winning average of 2.38 seconds and an event-best single of 1.68 seconds. Raiden Reynolds finished as the runner-up with an average of 2.56 seconds, while Kantaro Sakamoto returned to the podium to take third place with an average of 2.67 seconds.

Beyond the top steps of the podium, Kanto Summer AM 2025 served as a proving ground for competitors setting notable personal milestones. Itsuki Hori recorded a dramatic 54.6 percent improvement on their 2x2x2 Cube personal best with a 1.69 single, finishing 10th in the event, and also lowered their 3x3x3 Cube best to 9.44 seconds, a 9.9 percent drop. Roberto Atsuhiro Sanada tackled two events, delivering a first ever attempt at 2x2x2 Cube of 3.98 seconds while slashing 35.4 percent off their 3x3x3 Cube personal best with a 12.26 mark. Kosuke Ito secured a 20th place finish in 2x2x2 Cube on a first ever attempt of 2.40 seconds, alongside a 32.2 percent improvement on 3x3x3 Cube to 10.99 seconds.

Other competitors delivered equally impressive gains across both disciplines during this WCA competition. Souichirou Ashida logged a first ever attempt at 2x2x2 Cube of 4.96 seconds while shaving 29.1 percent off their 3x3x3 Cube best to hit 11.57 seconds. Yamato Sugita recorded a 20th place finish in 3x3x3 Cube with a personal best of 8.31 seconds, an improvement of 17.2 percent, and completed a first ever attempt at 2x2x2 Cube of 5.34 seconds. Ryota Takahashi registered a first ever attempt at 2x2x2 Cube of 6.76 seconds and improved their 3x3x3 Cube mark by 17.1 percent to 29.21 seconds. Ayaka Fayka Kusumah delivered a first ever attempt at 2x2x2 Cube of 3.59 seconds and a 13.1 percent personal best improvement in 3x3x3 Cube at 18.84 seconds, while Yuta Imai posted a first ever attempt at 2x2x2 Cube of 5.85 seconds and lowered their 3x3x3 Cube best by 11.9 percent to 21.11 seconds.

Across four rounds of scheduled play, the cubing competition showcased relentless consistency from the Japanese contingent, who swept all six available podium spots across the morning. From the early preliminary heats to the tense concluding solves, participants made every second count against the clock.

The successful conclusion of Kanto Summer AM 2025 highlighted the deep technical execution present across both events on the schedule. With sharp times logged and numerous individual milestones achieved in Ota, competitors departed with fresh experience to build on as the 2025 tournament calendar moves ahead toward the next season.

84名の選手が一堂に会した2025年8月30日、東京都大田区の大田区民プラザにてスピードキュービングの大会であるKanto Summer AM 2025が開催された。全2種目4ラウンドにわたる競技が行われ、会場には熱心なルービックキューブ愛好家たちが集まり、ラウンドの合間にも交流を深めながらキューブ談義や練習に花を咲かせる温かい光景が広がった。

今大会のメイン競技となった3x3x3 Cubeでは79名のエントリーがあり、白熱した2ラウンドの戦いが繰り広げられた。決勝ではKantaro Sakamoto (坂本貫太郎)が7.03の記録的なアベレージを叩き出し、見事に優勝の座を掴み取った。彼の最速単発タイムは6.03を記録し、会場の注目を一身に集めた。

3x3x3 Cubeの表彰台争いも激しいものとなり、Yoshiki Ando (安藤尭輝)が平均7.94で2位に入り、Sho Ogata (緒方昭)が平均8.35をマークして3位に続いた。上位陣が僅差で競り合うハイレベルな決勝ステージとなり、互いの好試技を称え合う姿が見られた。

一方の2x2x2 Cubeには68名が参加し、こちらも2ラウンド制で争われた。決勝ではWataru Takamiya (髙宮径)が平均2.38、単発1.68の圧巻のスピードを披露して頂点に立った。2位には平均2.56を記録したRaiden Reynolds (レイノルズ頼傳)、3位には3x3x3 Cube覇者のKantaro Sakamoto (坂本貫太郎)が平均2.67で入り、ダブル表彰台を達成した。

公式記録の行間には、個々の選手たちの素晴らしい挑戦と前進の物語が詰まっている。Rihito Hagita (萩田理仁)は2種目に出場し、2x2x2 Cubeで自己ベストを27.3パーセント縮める8.51を記録したほか、3x3x3 Cubeでも12.9パーセント短縮の31.54をマークした。Harunosuke Yoshida (吉田陽之丞)は3x3x3 Cubeで前記録から10.2パーセント向上となる8.14の自己ベストを出し、種目5位に入るとともに、初挑戦となった2x2x2 Cubeでも4.77を記録した。Ryoji Kobayashi (小林龍慈)は3x3x3 Cubeで7.6パーセント更新の15.72を達成し、初挑戦の2x2x2 Cubeで3.04を記録、Kazuki Utsugi (宇都木一輝)も初の2x2x2 Cubeで5.94、3x3x3 Cubeで19.01をマークした。

さらに今大会は多くの選手にとって記念すべき初めてのWCA公式大会となった。Ryo Chiba (千葉怜)は2種目に挑み、3x3x3 Cubeで13.01、2x2x2 Cubeで4.57を記録して2x2x2 Cube種目19位に食い込んだ。Keisuke Nagano (永野敬輔)は2種目で初記録を残し、2x2x2 Cubeで4.55、3x3x3 Cubeで16.28をマークした。Naoya Matsufuji (松藤尚也)は3x3x3 Cubeで16.52、2x2x2 Cubeで7.76を揃え、Masashi Kakishima (柿島将志)も3x3x3 Cubeで17.76、2x2x2 Cubeで5.61の公式初記録を堂々と刻み込んだ。

2x2x2 Cubeでは多くの選手が自己の限界を押し広げ、Raiden Reynolds (レイノルズ頼傳)が単発1.24および平均2.94をマークしたほか、Sho Ogata (緒方昭)が単発2.31と平均3.84、Shota Wakabayashi (若林翔太)が単発3.05と平均3.81を記録するなど、各選手が素晴らしい試技を披露した。

Ota, Tokyo, Japanの大田区民プラザで行われたKanto Summer AM 2025は、競技の緊張感とともに参加者同士の強い結束と楽しさが際立つ一日となった。スピードキューブを通じたコミュニティの輪は着実に広がりを見せており、選手たちはそれぞれの手応えを胸に会場を後にした。