SINGAPORE - The man who got on a bus and MRT train armed with a samurai sword was jailed for seven weeks on Wednesday.

Swordsmanship instructor and tattoo artist Peter Chua Teck Choon, 39, admitted causing hurt, threatening and using force on police officers. Four other charges, including outrage of modesty, were taken into consideration during sentencing.

The court heard that Chua was a substance abuser, had substance-induced psychosis and a long history of defaulting on his appointments at the Institute of Mental Health.

On Dec 16 last year, he wore a samurai outfit and carried a weapon known as a katana on a bus to Paya Lebar MRT station before getting off and poking it at a fellow passenger's stomach, leaving a red mark.

He then jumped over a fare gate and got on a west-bound train before three TransCom police officers boarded at Bugis in a bid to intercept him.

After changing lines, they caught up with Chua on a train to Dhoby Ghaut but when they asked him to get off it, he turned aggressive and abused them, pushing one on the chest and shouting vulgarities.

When they warned him about his behaviour, he unsheathed the sword and swung it in a threatening manner. The officers backed off and kept passengers at a safe distance.

Chua alighted at Dhoby Ghaut before catching another train to City Hall. He was arrested later at Jalan Pisang, off North Bridge Road.

Deputy Public Prosecutor Siti Adrianni Marhain told District Judge Ng Peng Hong that Chua showed clear disregard for the law by refusing to comply with the orders of the transport officers.