Know Your Japanese Runners in Boston

The withdrawal of Kentaro Nakamoto (Yasukawa Denki), Japan's best championship marathoner of the modern era, from the Boston Marathon field with a stress fracture is a blow to what would have been the best Japanese contingent in Boston in decades.

Yuki Kawauchi (Saitama Pref. Gov't) leads the way, arriving in Boston off wins in his last four marathons:

2:10:03, Hofu Yomiuri Marathon, 12/17/17
2:18:59 CR, Marshfield New Year's Day Marathon, 1/1/18
2:11:46 CR, Kitakyushu Marathon, 2/18/18
2:14:12, Wan Jin Shi Marathon, 3/18/18

Kawauchi hopes to at least equal Suguru Osako's top 3 placing in last year's Boston, his optimism growing as the weather forecast gets worse.

Naoki Okamoto (Chugoku Denryoku) runs for what was once Japan's most successful corporate team in the marathon, his best of 2:12:31 coming 6 years ago at Lake Biwa and his fastest recent time a 2:13:33 in Tokyo last year. Okamoto earned a place in Boston by winning February's tough and hilly Ome 30 km in 1:33:09.

A high-volume marathoner like Kawauchi, Kansuke Morihashi (Raffine) won January's Katsuta Marathon in 2:16:51 to earn an invite to Boston. A month later he followed up with a PB of 2:14:25 at the Tokyo Marathon, jogging the Seoul Marathon three weeks after that in a fun run effort.

Topping the women's side is another idiosyncratic high-volume marathoner, Hiroko Yoshitomi (Memolead). Yoshitomi won the hilly Katsuta Marathon in January in 2:33:56, the second-fastest winning time in event history, then came back a week later to smash the Beppu-Oita Mainichi Marathon course record with a 2:33:00 win. A week after that she took 9th in the National Corporate Half Marathon Championships in 1:13:58. Two weeks later in Tokyo she ran 2:30:16 for 6th, cutting over a minute off her five-year-old PB. Three weeks after that, a 2:33:57 win in her hometown Saga Sakura Marathon.

Ome women's winner Maki Ashi (Kyudenko) rounds out the Japanese lineup in her marathon debut at age 24. A 1:11:12 half marathoner, Ashi ran 1:44:14 in Ome to seal up a trip to Boston. Interestingly, joining her in Boston as her coach is the just-retired Kazuhiro Maeda, a longtime rival of Kawauchi's who was part of the 2013 Moscow World Championships team alongside both Kawauchi and Nakamoto.

All-time Boston Marathon Japanese Men's Top Ten

2:09:27 - Toshihiko Seko, 1st, 1981
2:10:13 - Toshihiko Seko, 2nd, 1979
2:10:28 - Suguru Osako, 3rd, 2017
2:11:02 - Hiromi Taniguchi, 4th, 1993
2:11:32 - Kenjiro Jitsui, 6th, 2006
2:11:50 - Toshihiko Seko, 1st, 1987
2:13:15 - Takayuki Inubushi, 10th, 1998
2:13:40 - Tomoyuki Taniguchi, 5th, 1987
2:13:49 - Yoshiaki Unetani, 1st, 1969
2:13:55 - Akinori Kuramata, 11th, 1998

All-time Boston Marathon Japanese Women's Top Ten

2:24:11 - Reiko Tosa, 3rd, 2006
2:26:26 - Yoshiko Yamamoto, 2nd, 1992
2:26:39 - Yuko Arimori, 3rd, 1999
2:26:52 - Kiyoko Shimahara, 5th, 2006
2:29:24 - Nobuko Fujimura, 3rd, 1996
2:30:34 - Mitsuko Hirose, 8th, 1999
2:30:40 - Yurika Nakamura, 6th, 2010
2:31:12 - Junko Asari, 6th, 1997
2:31:31 - Kaori Tanabe, 10th, 2001
2:31:39 - Yoshiko Yamamoto, 6th, 1995

Measuring Marathon Courses by Bicycle

http://news.searchina.ne.jp/disp.cgi?y=2013&d=0110&f=column_0110_034.shtml translated by Brett Larner The full marathon is a sport where you compete over 42.195 km, but how do they go about measuring that distance? Today we're going to look a little bit at how they go about certifying the distance of a marathon. The reality is that major international marathons use a bicycle to measure the distance. This rule is an international standard, and the same method of measurement is used everywhere. It was put into place in 1986. In order to ensure that the same method is used everywhere, a bicycle that meets IAAF specifications must be used for measurement. In the case of Japan's major marathons, to be certain that the distance is correct a provisional measurement is first made. Before the course is certified using a bicycle the course is measured using a 50 m-long length of wire to determine that it is in fact 42.195 km. When a bicycle is u...

Ai Hosoda Announces Retirement

photo © 2025 Victah Sailer/Photo Run, all rights reserved On Jan. 8 the Edion women's corporate team announced that Ai Hosoda , 30, will retire at the end of March this year. The Tokyo Marathon will be her last race. At Nagano Higashi H.S. Hosoda ran in the National High School Ekiden her 2nd and 3rd years. During her 3rd year at Nittai University she won both the 5000 m and 10000 m at the Kanto Region University Track and Field Championships, going on to win the bronze medal in the 10000 m at the World University Games in her 4th year at Nittai. After graduating she joined the Daihatsu corporate team, debuting at the 2019 Nagoya Women's Marathon in 2:29:27. 2 years later she transferred to Edion. She qualified for the Paris Olympics marathon trials at the 2022 Nagoya Women's Marathon and finished 3rd in the trials in the fall of 2023, but was later bumped down to Olympic alternate after another athlete ran a faster time. Instead of the Olympics, Hosoda ran the 2024 Ber...

Nat'l University Ekiden Updates Here

Looks like I just went over my update limit on Twitter - sorry, it's the first time I've tried to use it for this. I'll look for another option next time. In the meantime I'll add updates to the comments below. Not sure if that has a max too but I guess we'll find out. Update: Part one of the Nationals commentary can be found here .

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