Tetsuta Nagashima, winner of the season-opening 2020 Moto2 race in Qatar, has confirmed he will not be on the grid when the 2021 world championship gets underway.

Having followed his perfect Red Bull Ajo debut at Losail - which also marked his first grand prix podium - with a second-place next time at Jerez, Nagashima didn't appear on the rostrum again and eventually finished eighth in the standings.

It was still by far his best grand prix season, but Nagashima's name was absent from the provisional 2021 Moto2 entry list, with Ajo deciding on all-new line-up of Remy Gardner and Raul Fernandez, following Jorge Martin's move to MotoGP.

A brief Instagram post states that the 28-year-old Nagashima - who has campaigned Motobi, NTS, TSR and Kalex chassis since his 2013 Moto2 debut - will 'stop racing' in 2021 but also makes clear he intends to 'be back much more stronger':

Nagashima's withdraw also confirms that rookie Ai Ogura (Honda Team Asia) will be the only Japanese Moto2 rider this season:

Provisional 2021 Moto2 entry list
 RiderNATTEAMBIKE
#5Yari MontellaITASpeed Up Racing(Speed Up)
#6Cameron BeaubierUSATennor American Racing(Kalex)
#7Lorenzo BaldassarriITAMV Agusta Forward Racing(MV Agusta)
#9Jorge NavarroSPASpeed Up Racing(Speed Up)
#11Nicolo BulegaITAFederal Oil Gresini Moto2(Kalex)
#12Thomas LuthiSWIOnexox TKKR SAG Team(Kalex)
#13Celestino ViettiITASky Racing Team VR46(Kalex)
#14Tony ArbolinoITALiqui Moly Intact GP(Kalex)
#16Joe RobertsUSAItaltrans Racing Team(Kalex)
#19Lorenzo Dalla PortaITAItaltrans Racing Team(Kalex)
#21Fabio Di GiannantonioITAFederal Oil Gresini Moto2(Kalex)
#22Sam LowesGBREG 0,0 Marc VDS(Kalex)
#23Marcel SchrotterGERLiqui Moly Intact GP(Kalex)
#24Simone CorsiITAMV Agusta Forward Racing(MV Agusta)
#25Raul FernandezSPARed Bull KTM Ajo(Kalex)
#35Somkiat ChantraTHAIdemitsu Honda Team Asia(Kalex)
#37Augusto FernandezSPAEG 0,0 Marc VDS(Kalex)
#40Hector GarzoSPAPons HP40(Kalex)
#42Marcos RamirezSPATennor American Racing(Kalex)
#44Aron CanetSPAAspar Team(Speed Up)
#55Hafizh SyahrinMALNTS RW Racing GP(NTS)
#62Stefano ManziITAPons HP40(Kalex)
#70Barry BaltusBELNTS RW Racing GP(NTS)
#72Marco BezzecchiITASky Racing Team VR46(Kalex)
#75Albert ArenasSPAAspar Team(Speed Up)
#79Ai OguraJPNIdemitsu Honda Team Asia(Kalex)
#87Remy GardnerAUSRed Bull KTM Ajo(Kalex)
#96Jake DixonGBRPetronas Sprinta Racing(Kalex)
#97Xavi ViergeSPAPetronas Sprinta Racing(Kalex)
#99Kasma DanielMALOnexox TKKR SAG Team(Kalex)