Japan at the 2020 Winter Youth Olympics
Japan competed at the 2020 Winter Youth Olympics in Lausanne, Switzerland from 9 to 22 January 2020.
Medalists
| Medal | Name | Sport | Event | Date |
| Speed skating | Boys' 500 metres | |||
| Figure skating | Boys' singles | |||
| Speed skating | Boys' 1500 metres | |||
| Speed skating | Boys' mass start | |||
| Snowboarding | Girls' halfpipe | |||
| Snowboarding | Boys' halfpipe | |||
| Yuko Chujo Yuzuyu Fujii Nao Fukuda Komomo Ito Makoto Ito Minami Kamada Kaaya Komoto Nagomi Murakami Rio Noro Riri Noro Reina Sato Hina Shimomukai An Shinoda Himari Suzuki Masaki Tanabe Kyoka Tsutsumi Harua Umemori | Ice hockey | Girls' tournament | ||
| Snowboarding | Boys' big air | |||
| Snowboarding | Girls' big air | |||
| Speed skating | Girls' 1500 metres | |||
| Curling | Mixed team | |||
| Nordic combined | Girls' normal hill individual/4 km | |||
| Snowboarding | Girls' halfpipe | |||
| Snowboarding | Boys' halfpipe | |||
| Ski jumping | Mixed team normal hill | |||
| Snowboarding | Boys' big air | |||
| Speed skating | Girls' 500 metres |
Medalists in mixed NOCs events
| Medal | Name | Sport | Event | Date |
| Speed skating | Mixed team sprint | |||
| Figure skating | Team trophy | |||
| Speed skating | Mixed team sprint | |||
| Figure skating | Team trophy | |||
| Ice hockey | Girls' 3x3 mixed tournament | |||
| Ice hockey | Girls' 3x3 mixed tournament |
Alpine skiing
;Boys;Girls
;Mixed
Biathlon
;Boys| Athlete | Event | Time | Misses | Rank |
| Taiki Ito | Sprint | 24:27.9 | 5 | 81 |
| Taiki Ito | Individual | 46:57.6 | 13 | 91 |
| Keita Momen | Sprint | 25:35.7 | 7 | 90 |
| Keita Momen | Individual | 43:19.5 | 8 | 81 |
| Chiharu Ueda | Sprint | 22:38.0 | 5 | 52 |
| Chiharu Ueda | Individual | 42:20.7 | 10 | 71 |
;Girls
| Athlete | Event | Time | Misses | Rank |
| Kurea Matsuoka | Sprint | 23:18.7 | 2 | 75 |
| Kurea Matsuoka | Individual | 43:44.6 | 7 | 78 |
| Misa Sasaki | Sprint | 23:32.6 | 5 | 78 |
| Misa Sasaki | Individual | 40:58.3 | 7 | 66 |
;Mixed
| Athletes | Event | Time | Misses | Rank |
| Misa Sasaki Chiharu Ueda | Single mixed relay | 52:38.7 | 10+20 | 28 |
| Misa Sasaki Kurea Matsuoka Chiharu Ueda Taiki Ito | Mixed relay | 1:33:11.3 | 14+21 | 24 |
Cross-country skiing
;GirlsCurling
Japan qualified a mixed team of four athletes.;Mixed team
;Mixed doubles
Figure skating
Two Japanese figure skaters achieved quota places for Japan based on the results of the 2019 World Junior Figure Skating Championships.;Singles
;Couples
;Mixed NOC team trophy
Freestyle skiing
;Slopestyle & Big AirIce hockey
Girls' tournament
;Summary;Team roster
- Yuko Chujo
- Yuzuyu Fujii
- Nao Fukuda
- Komomo Ito
- Makoto Ito
- Minami Kamada
- Kaaya Komoto
- Nagomi Murakami
- Rio Noro
- Riri Noro
- Reina Sato
- Hina Shimomukai
- An Shinoda
- Himari Suzuki
- Masaki Tanabe
- Kyoka Tsutsumi
- Harua Umemori
Mixed NOC 3x3 tournament
- Gosei Daikuhara
- Issa Otsuka
- Wataru Suzuki
- Tomoyoshi Yuki
- Sena Hasegawa
- Ruka Kiyokawa
- Yuna Kusama
- Riko Matsumoto
- Reina Sato
Luge
Nordic combined
;IndividualShort track speed skating
Three Japanese skaters achieved quota places for Japan based on the results of the 2019 World Junior Short Track Speed Skating Championships.;Boys
;Girls
Skeleton
Ski jumping
;Boys;Girls
Snowboarding
;Snowboard cross;Halfpipe, Slopestyle, & Big Air
Speed skating
Four Japanese skaters achieved quota places for Japan based on the results of the 2019 World Junior Speed Skating Championships.;Boys
;Girls
;Mass Start
;Mixed
| Athlete | Event | Time | Rank |
| Team 3 | Mixed team sprint | 2:04.10 | |
| Team 7 | Mixed team sprint | 2:06.80 | 5 |
| Team 10 | Mixed team sprint | 2:08.62 | 10 |
| Team 16 | Mixed team sprint | 2:05.92 |