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 | Sachi Amma, 36 years old |
 Man  Japan | |
 Born on january 1st 1989 | |
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| > Hardest bouldering sends (font 8c & +) | ||||
| Dates | Grades | Route | Rock climbing area | Country |
| may 13th 2014 | 8c | Hydrangea | Shiobara | Japan |
| march 16th 2016 | 8c | Asagimadara | Mount Mizugaki | Japan |
| Dates | Grades | Route | Rock climbing area | Country |
| dec 4th 2013 | 9a/9a+ | La Tierra Negra | Margalef (La Visera de la Coma) | Spain |
| july 6th 2016 | 9a/9a+ | Thor's Hammer | Flatanger | Norway |
| dec 24th 2010 | 9a+ | Papichulo | Oliana | Spain |
| nov 29th 2012 | 9a+ | La Rambla | Siurana | Spain |
| aug 7th 2014 | 9a+ | Biographie | Céüse | France |
| feb 11th 2015 | 9a+ | Catxasa | Santa Linya | Spain |
| feb 16th 2015 | 9a+ | Power inverter | Oliana | Spain |
| feb 19th 2015 | 9a+ | Selecció Anal | Santa Linya | Spain |
| june 3rd 2015 | 9a+ | Tinipi | Mount Kinabalu | Malaysia |
| sept 17th 2015 | 9a+ | Jungle Boogie | Céüse | France |
| dec 22nd 2017 | 9a+ | Maturity | Gozen-Yama (Gozen Rock) | Japan |
| nov 15th 2018 | 9a+ | Rise | Futagoyama | Japan |
| dec 17th 2011 | 9a+/9b | Pachamama | Oliana | Spain |
| feb 1st 2015 | 9b | Fight or Flight | Oliana | Spain |
| march 25th 2018 | 5.15b (9b) | Soul Mate | Gozen-Yama (Gozen Rock) | Japan |
| march 26th 2019 | 9b | Stoking The Fire | Santa Linya | Spain |
| > The two first decades of the french 9a (1991-2011) | ||||
| Dates | Grades | Route | Rock climbing area | Country |
| aug 25th 2009 | 9a | KinématiX (Total Eclatch+Honk) | Les Gorges du Loup (Déversé) | France |
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