Ai Takagi, who is 12-weeks pregnant, is the Chief Editor of socio-political website 'The Real Singapore' (TRS). She surrendered herself at the State Courts yesterday to begin the jail term, The Straits Times reported today.
She was convicted of sedition last month after she pleaded guilty to publishing "seditious articles" on the TRS website.
Her sentence was deferred till yesterday.
The court had found that the articles published by TRS were intended to "provoke unwarranted hatred against foreigners in Singapore" and jailed her for 10 months.
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Takagi had also apologised in open court to the people of Singapore for the harm the published articles had caused.
Admitting she was not fully aware of the level of sensitivity needed when dealing with racial and religious issues here, Takagi claimed that she "loves" Singapore and hopes to call it her home permanently.
One article was entitled "Why Some Singaporeans Feel Annoyed With Pinoys (a short name for Filipinos) In Singapore" and published in June 2014.
The article quoted a Singaporean who allegedly quit his job claiming Filipinos in his company gave preferential treatment to their countrymen. It described them as "two- faced" and "relentless back-stabbers".
Takag's Singaporean husband Yang Kaiheng, 27, is on trial for allegedly helping her run the site. He is expected back in court on June 22 when the case resumes.