Due to the increase in the number of COVID-19 cases in Japan, a Stay-Home Notice (SHN) of 14 days at a designated facility will again be imposed on all travellers entering Singapore from Japan in any case.
All travellers entering Singapore after 11:59pm on 22 November 2020 who have a SHN in Japan within the past 14 days will be required to have a SHN in the designated facility.
Those with a history of the stay must receive 14 days of SHN at a designated STAY HOME NOTICE facility. (At one time, a stay at home option was available for the return of a resident astronaut, but this is no longer allowed.)
Information on the Embassy of Japan (updated November 20, 2020)
https://www.sg.emb-japan.go.jp/files/100117701.pdf
Official information from the Singapore government (from the MOM/Ministry of Manpower page)
https://www.moh.gov.sg/news-highlights/details/updated-border-measures-for-travellers-from-malaysia-and-japan
How to get into Singapore
https://safetravel.ica.gov.sg/japan/rgl/requirements-and-process
++++++++++++++++++++++++++++++++++++++++++++++++++++
We offer the following services in spite of the difficulties in entering Singapore.
Online food business meeting
Food and food-related field study
Taste Survey
Mystery Shopper
Questionnaire Survey of Singaporeans and Japanese living in Singapore
Media PR (from press release writing to online events)
Although 80% of our business is in the field of food, please contact us for more information on other fields.
Please contact us at info@alchemist.sg
English (UK) 
日本語