Tokai Summer 2025

The tournament floor inside Aichi Industry and Labor Center WINC Aichi was filled with focused intensity on July 27, 2025. Rows of timers and display screens lined the venue as 94 competitors gathered for a single concentrated day of high-level puzzle solving. With single-round formats putting immense pressure on every solve, the room carried the steady rhythm of quick inspections followed by rapid turns. Every solve carried serious weight across the three scheduled disciplines.

In competitive speedcubing formats where every turn matters, there is no safety cushion for errors. A single mistimed algorithm or slight lockup can dismantle an entire average in an instant. Speed cubing demands complete consistency across every start and stop of the timer, and the stakes were elevated in Nagoya, Aichi, Japan where solvers had just one round to prove their form. Competitors had to balance pure turning velocity against the constant threat of a costly mistake.

The 5x5x5 Cube event highlighted how thin the line between victory and defeat can be. Amey Gaba of India captured first place with a winning average of 54.39 seconds, complemented by a single solve of 48.33 seconds across a field of 46 competitors. Noah Calderon-Kamata of the United Kingdom pushed hard to finish second with a 54.54 average, while Takeru Iguchi of Japan earned third place right behind them at 54.64. Just a quarter of a second separated the top three finishers.

In the 3x3x3 One-Handed event, 53 competitors stepped forward to solve the classic puzzle with a single hand. Takumi Kato delivered a dominant showing to take victory with an average of 10.26 seconds, bolstered by the best single time of 7.24 seconds. Noah Calderon-Kamata secured another podium spot by claiming second place with a 13.06 average, while Yuki Matsui rounded out the top three for Japan with a solid 13.21 mark.

Beyond the top podium steps, several solvers delivered standout milestones across multiple categories. Ryan Huang entered three events and secured a 25th-place finish in 5x5x5 Cube, improving their 3x3x3 One-Handed personal best to 20.24, which was 62.4 percent faster than their previous mark, alongside an 8.8 percent improvement in 5x5x5 Cube to 1:22.49. Shota Watanabe recorded a 33 percent reduction on their 3x3x3 Cube personal best down to 6.87 seconds and logged a first ever attempt at 3x3x3 One-Handed with 27.24. Yuto Yamada achieved a personal best of 9.71 in 3x3x3 Cube, 24.4 percent faster, and posted a 33.28 in their first ever attempt at 3x3x3 One-Handed. Mitsuki Sugiura placed 11th in 3x3x3 Cube, improved their one-handed mark by 15.9 percent to 14.88, cut their 3x3x3 Cube best to 8.61, and logged a first ever attempt at 5x5x5 Cube of 1:20.08.

The progression continued through several multi-discipline efforts across the roster. Katsumi Seino achieved a 19th-place finish in 5x5x5 Cube while completing a first ever attempt at 3x3x3 One-Handed in 21.47 and a first ever attempt at 5x5x5 Cube in 1:11.68. Ojiro Nakagami improved their 3x3x3 Cube mark to 13.72, a 15.3 percent jump, while making a first ever attempt at 3x3x3 One-Handed with 41.82. Kodai Ueda entered three events, taking 31st in 5x5x5 Cube, setting personal bests of 1:32.17 in 5x5x5 Cube and 10.60 in 3x3x3 Cube, and completing a first ever attempt at 3x3x3 One-Handed in 32.72. Ryosei Yamada also took on three events, achieving an 11.2 percent personal best improvement to 21.60 in 3x3x3 One-Handed and logging a first ever attempt at 5x5x5 Cube in 1:45.11.

The main Rubik's Cube competition drew 92 competitors to the tables for a fast-paced single round. Masaya Nakamoto earned top honors with a winning average of 7.34 seconds and a best single of 6.36 seconds. Kantaro Sakamoto finished closely behind in second place with a 7.46 average and a 6.98 single, while Noah Calderon-Kamata completed an impressive three-podium haul by taking third place with an average of 7.59. The official 3x3 results confirmed the remarkable depth of the event.

International representation was strong across the board, with Japan claiming 5 podium places, the United Kingdom earning 3, and India capturing 1. Tokai Summer 2025 provided an intense platform for both established frontrunners and emerging competitors to test their preparation under demanding single-round conditions. As the action wrapped up at Tokai Summer 2025, the community celebrated a memorable WCA competition filled with precise turning and high-stakes finishes.

94名の競技者が一堂に会したスピードキュービングの舞台で、開催国である日本の選手たちが表彰台全9枠のうち5枠を獲得する強さを見せました。愛知県産業労働センター（ウインク愛知）で開催されたTokai Summer 2025は、全3種目の決勝が1ラウンド制の一発勝負で行われ、会場となったNagoya, Aichi, Japanには熱気があふれました。

2025年7月27日に行われたこの大会で、花形種目であるルービックキューブ（3x3x3 Cube）には92名が出場しました。ハイレベルな争奪戦を制したのはMasaya Nakamoto (中本誠也)で、記録した平均7.34は見事な優勝タイムとなりました。単発でも6.36をマークし、堂々の首位に輝いています。

3x3x3 Cube部門の表彰台争いは最後まで激しさを極めました。Kantaro Sakamoto (坂本貫太郎)が単発6.98、平均7.46を叩き出して2位に食い込み、日本勢によるワンツーフィニッシュを達成しました。3位には平均7.59を記録したイギリスのNoah Calderon-Kamataが入り、僅差の戦いを締めくくりました。

片手で立方体を操る3x3x3 One-Handedでは、Takumi Kato (加藤匠)が他を寄せ付けないパフォーマンスを披露しました。Takumi Kato (加藤匠)は単発7.24、平均10.26という抜群の記録で圧勝を収めています。2位には平均13.06のNoah Calderon-Kamata、3位には平均13.21のYuki Matsui (松井裕希)が入り、日本勢が複数入賞を果たしました。

大型パズルである5x5x5 Cubeでは、国際色豊かな大接戦が繰り広げられました。インドのAmey Gabaが平均54.39、単発48.33をマークして接戦を制し頂点に立ちました。2位のNoah Calderon-Kamataが平均54.54、3位のTakeru Iguchi (井口丈瑠)が平均54.64と、わずか0.25秒の間にトップ3がひしめく歴史的な好勝負となりました。

今大会の結果表の奥には、確かな成長を刻んだ選手たちの挑戦の記録があります。Ryuichi Hayase (早瀬龍一)は3x3x3 One-Handedで自己記録を23.8パーセント縮める23.55を記録し、5x5x5 Cubeでも1:37.06の自己ベストを更新しました。Kento Hirai (平井健斗)は5x5x5 Cubeで自己ベストを6パーセント短縮する57.75をマークして12位に入り、3x3x3 One-Handedへの初挑戦でも23.06を残しました。Taiki Nakatani (中谷太紀)は3x3x3 Cubeで6.3パーセント短縮となる11.25の自己ベストを樹立し、初の3x3x3 One-Handedで19.39を記録しました。Shunichi Hirota (廣田駿一)も3x3x3 One-Handedに初参戦して26.26を残したほか、5x5x5 Cubeで2:09.07の自己ベストを記録しています。

公式戦の第一歩を踏み出した選手たちの健闘も光りました。今大会が初のWCA大会となったRyota Hayashi (林亮太)は3種目に出場し、3x3x3 Cubeで12.47、3x3x3 One-Handedで40.30、5x5x5 Cubeで2:18.93を記録しました。同じく初出場のKazuma Takahira (高比良和真)は3x3x3 Cubeで11.99を記録して49位に入り、Aoto Hamano (濱野葵翔)は初挑戦で19.07、Masaaki Hamano (濱野将翠)も初挑戦で53.26をマークして完走を果たしました。

各選手が磨き上げた技術を存分に発揮したTokai Summer 2025は、日本勢の層の厚さと新世代の台頭を印象づけて幕を閉じました。ワンデイのコンパクトな日程ながら濃密な好記録が続出した週末を経て、キューバーたちは早くも次のシーズンでのさらなる飛躍を見据えています。