The result doesn’t augur well for the Lions, who are preparing for their first Mitsubishi Electric Cup under Ogura.
Ogura, a former assistant coach of the Japanese national football team, was announced as the new Singapore head coach in February.
The 58-year-old led the Lions to a 2-2 home draw against China in his first match in charge, with Singapore mounting a comeback from two goals down.
In the subsequent World Cup Asian qualifying matches, Singapore lost 1-4 to China, 7-0 to South Korea and 3-1 to Thailand.
The Lions ended their group-stage campaign with a solitary point – after no wins, a draw and five losses.
As part of the team’s preparations for the Mitsubishi Electric Cup, the Lions played two home training matches in September. The games against BG Tampines Rovers and Malaysia’s Johor Darul Ta’zim were played behind closed doors.
In a training camp in Japan last month, Singapore faced three J1 League sides. They lost 4-0 to FC Tokyo before beating Tokyo Verdy 2-1. The Lions were then hammered 7-1 in their final match by Yokohama F Marinos.
The Lions have been grouped with Cambodia, East Timor, Malaysia and Thailand in Group A of the Asean tournament, popularly known as the AFF Championships. The top two teams from Group A and B will progress to the semi-finals.
Singapore was eliminated in the group stage in the last edition of the tournament.
