Question: What is the distance of the sister sport event of the Ultra-Trail Mt. Fuji?

Context paragraphs:
6 Hours of Fuji: The 6 Hours of Fuji (formerly the Fuji 1000 Kilometres) is a sports car race held at Fuji Speedway in Oyama, Shizuoka, Japan.  The race was held for the first time in 1967 and in 1977 became part of the new Fuji Long Distance Series.  In 1982 a second 1000 km race known as "WEC in Japan" was run as a round of the World Sportscar Championship.  The All Japan Sports Prototype Championship was formed in 1983, and since then co-sanctioned this event.  The World Championship left after 1988, but the JSPC carried on both races until 1992.  The race was revived in 1999 as an attempt to gauge interest in an Asian Le Mans Series that never materialized.  The race was revived again as a part of the short-lived Japan Le Mans Challenge in 2007.  The race returned again as part of the 2012 FIA World Endurance Championship season, but changed to a 6-hour race, with no distance limit.

Ultra-Trail Mt. Fuji: The Ultra-Trail Mt. Fuji (ウルトラトレイル・マウントフジ , urutoratoreirumountofuji ) is an annual ultramarathon sporting event in Yamanashi Prefecture and Shizuoka Prefecture, Japan, started in 2012.  The total distance is 168 km, the cumulative altitude gain is 9,500m, and the time limit is 46 hours.  It is one of the Ultra-Trail World Tour.  It is a sister sport event of Ultra-Trail du Mont-Blanc.

Ultra-Trail du Mont-Blanc: The Ultra-Trail du Mont-Blanc (also referred to as UTMB) is a single-stage mountain ultramarathon.  It takes place once a year on either the last weekend in August or the first weekend of September in the Alps, and follows the route of the Tour du Mont Blanc through France, Italy and Switzerland.  It has a distance of approximately 166 km , and a total elevation gain of around 9,600 m.  It is widely regarded as one of the most difficult foot races in the world, and one of the largest with more than 2,000 starters.  It is one race during a week-long festival based around Chamonix in France.  The combined participation in all of the events over the week is approaching 10,000 runners.  The races have strict entry requirements which include accumulating enough race points through qualifier races in the previous two years.

Fuji Fire and Marine Insurance: The Fuji Fire and Marine Insurance Co., Ltd. (富士火災海上保険株式会社 , "Fuji Kasai Kaijō Hoken Kabushiki Kaisha" ) is a Japanese insurance company.  It has its corporate headquarters in the Kamiyacho MT Building (神谷町MTビル "Kamiyachō MT Biru") in Toranomon, Minato, Tokyo and its Osaka offices in Chuo-ku, Osaka.

Krissy Moehl: Kristin "Krissy" Moehl (born October 27, 1977) is an American ultramarathon athlete who specializes in trail running.  In 2005, Moehl became the youngest woman to complete the Grand Slam of Ultrarunning, which included a gold medal at the Vermont 100 Mile Endurance Run.  She set the women's record for the Hardrock Hundred Mile Endurance Run in 2007.  Moehl has won several ultramarathons, including the Ultra-Trail du Mont-Blanc in 2003 and 2009, the Wasatch Front 100 Mile Endurance Run in 2004, and the Ultra-Trail Mt. Fuji in 2013.  Krissy Moehl published a book "Running Your First Ultra: Customizable Training Plans for Your First 50K to 100-mile Race" in November 2015.  She is the race director for the Chuckanut 50k in Fairhaven, Washington.

Slender Means: Slender Means (2003–2010) was an indie rock band from Seattle, Washington.  Their debut album, "Neon & Ruin" on Mt. Fuji Records, was released Tuesday, August 23, 2005 on Mt. Fuji Records.  In 2007 they put out a five-song E.P. containing previously unreleased material and a live track from the 90.3 KEXP show, Audio Oasis.  On November 15, 2009 they released their 2nd LP "Adrift In The Cosmos."  The writing of their 3rd LP came to an abrupt halt at the end of 2010 when the band decided to take an extended hiatus until finally announcing they had officially broken up.  Some of the other members are still busy playing in other projects.  Eric Wennberg had a project called Mal de Mer, and more recently joined up with The Young Evils.  Eric and Josh and Paul have also been recording some material in a new project called, Timbre Barons.  Paul Pugliese is playing in the surfy, gypsy jazz trio "Johnny NordstrUm and the Retailers."  Dave E. Martin joined up with the Pop/Rock band Black Whales in September opf 2010.  He was asked to fill in on keyboards for a show after Mike Bayer decided to leave the band to focus on his other music projects.  Black Whales released their debut full-length record "Shangri-La Indeed! "on June 28, 2011.  Martin contributed keyboards to 6 tracks and a musical saw track that was looped at the beginning of the album's opening song.  Sonny Votolato recently played bass on his brother Rocky's "Television Of Saints" record.  In March 2012, Sonny, Paul and Dave reunited to form the new band "Bye Gones" with Drummer Abdon Valdez.  Their first show was played at Sweet Lou's in North Seattle on August 18, 2012.  Bye Gones was a very short lived project and came to an end around October 2012.  However, Martin has continued to write songs for yet another project under the moniker, Ghost Pains along with Absolute Monarchs drummer Michael Stubz.

Green sport event: A green sport event is a sporting event that stresses utilizing greener resources.  Fans can do their part by riding public transportation to the event.  People are being more aware of many things, like using earth friendly paper products, fertilizer and pesticides.  Also see sustainable event management or event greening.

Tenjō-Yama Park Mt. Kachi Kachi Ropeway: The Tenjō-Yama Park Mt. Kachi Kachi Ropeway (天上山公園カチカチ山ロープウェイ , Tenjōyama Kōen Kachikachiyama Rōpuwei ) , officially the Lake Kawaguchi Mt. Tenjō Ropeway (河口湖天上山ロープウェイ , Kawaguchiko Tenjōyama Rōpuwei ) , is a Japanese aerial lift line in Fujikawaguchiko, Yamanashi, operated by Fuji Kyuko.  Opened in 1959, the line climbs Mount Tenjō from the shores of Lake Kawaguchi, one of the Fuji Five Lakes.  The line name comes from "Kachi-kachi Yama" (lit.  "Mt. Kachikachi"), a folktale which took place on the mountain.  The observatory has a view of the lake, as well as Aokigahara forest, and Mount Fuji.

Ten Sport: Ten Sport (stylised as TEN Sport, known as Ten's World of Sport from 1992 until 1996) is the brand that all sporting events broadcast on Network Ten are broadcast under, including the former sport event team; the Logie Award winning AFL commentary team hosted by Stephen Quartermain.

Fujiyamashita Station: Fujiyamashita Station (富士山下駅 , Fujiyama-shita-eki ) is a passenger railway station on the Jōmō Line in Kiryū, Gunma, Japan, operated by the private railway operator Jōmō Electric Railway Company.  Travelers looking for Mt. Fuji should be careful not to mistakenly come to this station.  Fujiyamashita Station is around 200 km and two prefectures away from Japan's most famous mountain.  The name means "The bottom of Fuji Mountain" and when written in kanji characters is identical to Mt. Fuji, but does not have any relation to the popular tourist destination.

Supporting paragraphs: Ultra-Trail Mt. Fuji Ultra-Trail du Mont-Blanc
Answer: 166 km