Karen See has been promoted to co-manager alongside Matthew Brett on the Japanese Income Growth Fund.
The fund has amassed assets of over £100m since launch in July 2016. It has grown 17% since then, versus 19% from the average retail Japan equity fund.
See has been with Baillie Gifford since joining as a graduate in 2012.
Elsewhere, Felicia Hjertman, who joined the team also as a graduate in 2011, has been promoted to work alongside Praveen Kumar on the £300m Japanese Smaller Companies Fund.
Over three years, the fund delivered 77% versus 66% from the Japanese Smaller Companies sector, according to FE Analytics.
James Budden, director of retail marketing and distribution, said: “Baillie Gifford has a team-based approach to fund management and we see strong merits in the appointment of co-managers across our range of Oeics.”