Ota Blind Summer 2023

A razor-thin margin in the 3x3x3 Blindfolded final delivered the defining moment of the weekend when Yuki Yamamoto sealed the victory with a blistering 28.26 single on the final round. That decisive effort edged out Shuto Ueno, whose 34.60 secured second place, while Keiichiro Taira completed the podium in 30.31 during a tense showcase of memory and precision. The dramatic climax concluded an intense single-day WCA competition at Ikegamikaikan Hall in Ota, Tokyo, Japan on July 8, 2023, where 58 competitors gathered to test their skills across five rounds of blindfolded and big-cube disciplines.

The 3x3x3 Blindfolded event drew a competitive field of 45 entrants across three separate rounds, challenging speedcubing athletes to rely entirely on memorisation before executing rapid execution phases unseen. Beyond the podium finishers, the contest saw multiple notable times logged during the rounds, including a 24.02 single from Masato Fujiwara, a 31.86 from Akito Takei, a 31.93 from Shiori Yanai, and a 35.09 from Vietnam competitor Nguyen Dao Quoc Anh. Yamamoto stayed composed through every stage to earn the gold.

In the 4x4x4 Blindfolded discipline, Naoto Shinagawa put together a masterclass performance to take top honors among 28 competitors in a single-round clash. Shinagawa delivered a winning single time of 2:21.14 to claim first place comfortably. Yuki Yamamoto proved his versatility across sightless events by earning silver with a time of 3:57.47, while Taku Yanai rounded out the podium positions in third place with a 4:30.75 result.

The large puzzle lineup shifted focus to standard sight solving on the 7x7x7 Cube, which featured 31 competitors in a fast-paced single round. Tomoya Iida took the championship title with a winning average of 2:43.15, bolstered by the best single time of the event at 2:29.59. Tomohiro Kobayashi followed closely behind in second place with a 2:47.38 average, and Kakeru Fukuda stepped onto the third step of the podium with an average of 2:54.62.

Away from the top steps of the podium, several competitors achieved remarkable milestones across their individual campaigns. Mahiro Tanaka entered two events and made significant progress, taking ninth in 3x3x3 Blindfolded while setting a personal best of 1:11.68, an improvement of 53.8 percent over a previous mark of 2:35.10. Kento Hirai took on two events and finished fourth in 7x7x7 Cube with a first-ever attempt of 2:57.60, while cutting his 3x3x3 Blindfolded personal best by 42.5 percent down to 3:02.48.

Other athletes embraced major leaps in efficiency and tackled brand new puzzle formats. Akatsuki Kitamura took on three events, completing a first-ever attempt on the 7x7x7 Cube in 8:25.84 and achieving a 4x4x4 Blindfolded personal best of 11:06.00, which was 40.9 percent faster than the previous 18:47.00 record. Yuito Nozaki logged a first attempt in 3x3x3 Blindfolded at 4:10.74 while dropping his 7x7x7 Cube personal best to 3:48.81 for a 40.3 percent improvement, finishing 12th.

Further solid results rounded out the day as Yuichi Hamada competed in three events, recording a first-ever 7x7x7 Cube attempt of 8:09.25 and taking 12th in 4x4x4 Blindfolded with a personal best of 10:38.00, an improvement of 20.4 percent. Hiroki Katagiri also posted a first-ever 7x7x7 Cube attempt of 5:53.11 and reached eighth place in 3x3x3 Blindfolded with a personal best of 47.73, marking a 19.4 percent reduction from his prior best of 59.23.

The cubing competition concluded with Japanese competitors sweeping all nine podium places across the three featured disciplines. The single-day speed cubing gathering offered a focused schedule that brought together specialists in memory solving and big-puzzle mastery, balancing the classic Rubik's Cube blindfolded variants with large-scale mechanical challenges. Enthusiasts tracking blindfolded marks and 3x3 results found plenty of high-stakes action throughout the rounds.

With five total rounds completed across the schedule, Ota Blind Summer 2023 provided a premier showcase for Japan's blindfolded and big-cube talent. The clutch performances delivered under Ikegamikaikan Hall's lights set a high standard for competitors heading into the remainder of the season.

東京都大田区の池上会館で開催されたOta Blind Summer 2023において、3x3x3 Blindfolded決勝でYuki Yamamoto (山本祐輝)が28.26という驚異的な単発タイムを叩き出し、頂点に立ちました。一瞬の記憶の狂いも許されない過酷な条件下で、勝負を決める決定的な試技を成功させた瞬間でした。

2023年7月8日に行われたこのスピードキュービングの大会には、総勢58名の選手が集結しました。ルービックキューブの高度な技術を競うWCA公認大会として、3種目5ラウンドが実施され、目隠し競技を中心とする高い集中力が求められる舞台で、参加者たちは熱戦を繰り広げました。

3x3x3 Blindfolded種目では、45名のエントリーの中から3ラウンドを勝ち抜いた精鋭たちが決勝で激突しました。優勝したYuki Yamamoto (山本祐輝)に続き、Shuto Ueno (上野柊斗)が34.60で2位に入り、Keiichiro Taira (平佳一郎)が30.31をマークして3位表彰台を獲得しました。

4x4x4 Blindfoldedは28名が挑戦する屈指の難関種目となりました。この大舞台を制したのはNaoto Shinagawa (品川直登)で、2:21.14という圧巻の単発タイムを記録して見事に優勝を果たしました。2位には3:57.47を残したYuki Yamamoto (山本祐輝)、3位には4:30.75を記録したTaku Yanai (矢内拓)が入りました。

目隠し競技とは対照的に、視覚と指先の極限の連動が試される7x7x7 Cubeには31名が出場しました。Tomoya Iida (飯田朋也)が平均2:43.15、単発2:29.59のハイレベルな記録を揃えて堂々の優勝を飾りました。Tomohiro Kobayashi (小林知広)が平均2:47.38で2位、Kakeru Fukuda (福田翔)が平均2:54.62で3位に続いています。

上位争いの陰で、多くのキューバーが自らの限界に挑戦し大きな前進を遂げました。Kohei Tsuji (辻航平)は3x3x3 Blindfoldedで前回の自己ベスト3:30.23から29.4%縮める2:28.47を記録し、Zirui Wang (王子睿)は7x7x7 Cubeで従来の自己記録6:09.96から28.5%短縮する4:24.46を叩き出して22位となりました。

さらに新たな種目への初挑戦も輝きを放ちました。Yusuke Katayama (片山悠介)は3x3x3 Blindfoldedの初試技で2:04.54をマークして4x4x4 Blindfoldedで16位となり、Yuki Kanemoto (金本悠生)も3x3x3 Blindfolded初挑戦で51.76を揃えて4x4x4 Blindfoldedで16位に入りました。また7x7x7 Cubeに初挑戦したFumika Hoshino (星野史佳)は5:07.12で20位、Kazue Kobayashi (小林和惠)は5:00.61で24位を記録しました。

Ota, Tokyo, Japanの地で開催されたOta Blind Summer 2023は、日本の選手たちが全表彰台の9枠を占めるなど、国内キュービング界の層の厚さを改めて証明する大会となりました。各選手がそれぞれの挑戦を通じて残した記録は、次なる大会への確かな礎となります。