Jason Tsai

{{Short description|Taiwanese businessman}}

{{Use dmy dates|date=March 2025}}{{Use British English|date=October 2020}}

{{Infobox person

| name = Jason Tsai

| image = JasonTsai-BuckinghamPalace.jpg

| alt = A colour photograph of Jason Tsai, alongside his wife Ruth Tsai. The couple are dressed in formal wear: Jason is wearing a black morning suit with a grey top hat and matching grey necktie and pocket handkerchief; his wife Ruth is wearing a full-length white dress, matching white jacket and white hat. The couple are standing in the red-gravelled courtyard of Buckingham Palace – the central London official residence of Queen Elizabeth II, the reigning monarch of the United Kingdom of Great Britain and Northern Ireland. In the background are other unidentifiable people in similar attire.

| caption = Jason Tsai and his wife in front of Buckingham Palace, July 1997

| native_name = 蔡吉春

| native_name_lang = zh

| pronunciation =

| birth_name = Tsai Ji-chun

| birth_date = {{Birth date and age|1951|5|17|df=yes}}

| birth_place = Tainan County, Taiwan

| other_names =

| education = Birmingham University

| occupation = Businessman

| years_active =

| known_for = Founder & chairman of Entagroup:
Entatech UK Ltd
Entamedia Ltd
Enta.net

| net_worth =

| height =

| boards =

| criminal_charges = Carousel fraud, Contempt of Court

| criminal_penalty = 18 months imprisonment

| criminal_status =

| spouse = Ruth Tsai

| children = 2

| mother =

| father =

| awards = see awards and achievements

| website =

| footnotes =

}}

Jason Tsai (born Tsai Ji-chun {{Lang-zh|c=蔡吉春|p=Cài Jíchūn}}; 17 May 1951 at Tainan County, Taiwan, is a Taiwanese founder and chairman of the Entagroup of telecommunications companies in the United Kingdom (UK);{{Cite web|title=Entagroup founder named 'Channel Entrepreneur of the Year'|url=https://www.CommsBusiness.co.uk/news/entagroup-founder-named-channel-entrepreneur-of-the-year/|website=CommsBusiness.co.uk|publisher=Comms Business – MA Business Limited|date=7 June 2010|access-date=30 October 2020}} including Entatech UK Ltd, Entamedia Ltd, and Enta.net. He is also the founder of UK Telford Chinese School,{{Cite web|title=海外創業青年楷模: 蔡吉春|trans-title=Young Model of Overseas Entrepreneurship: Cai Jichun|url=http://www.OCAC.gov.tw/public/dep3public.asp?selno=2353&no=2353&level=B|website=OCAC.gov.tw|language=zh-tw|location=Taipei City 10055, Taiwan (R.O.C.)|publisher=Overseas Community Affairs Council (OCAC), Republic of China (Taiwan)|archive-url=https://archive.today/20130819152942/http://www.OCAC.gov.tw/public/dep3public.asp?selno=2353&no=2353&level=B|url-status=dead|archive-date=19 August 2013|access-date=19 August 2013}} and the president of The Tsai Lao-Chi Charitable Foundation in the UK.{{Cite web|title=Entagroup.com: Charitable Foundation|url=http://www.entagroup.com/culture/charitable-foundation.htm|website=Entagroup.com|publisher=Entagroup|access-date=19 August 2013|url-status=dead|archive-url=https://web.archive.org/web/20130901180400/http://entagroup.com/culture/charitable-foundation.htm|archive-date=1 September 2013}}

His British-registered company Changtel was found by Her Majesty's Revenue and Customs (HMRC){{When|date=August 2021}} to have participated in carousel fraud, as a result of which Tsai lost control of Entatech. On 8 May 2017, as the final link to that fraud, Entatech entered administration, and 50 people lost their jobs overnight. On 21 July 2017, Tsai was sentenced to imprisonment for 18 months at the High Court of Justice (Chancery Division){{Cite web|url=http://www.Bailii.org/ew/cases/EWHC/Ch/2017/1860.image1.pdf|title=Committal for Contempt of Court – Jason Tsai|website=Bailii.org|publisher=British and Irish Legal Information Institute|date=21 July 2017|access-date=30 October 2020}} for Contempt of Court on account of 27 breaches of a Freezing Order.{{Cite web|url=http://www.Bailii.org/ew/cases/EWHC/Ch/2017/1860.html|title=[2017] EWHC 1860 (Ch)|website=Bailii.org|publisher=British and Irish Legal Information Institute|date=21 July 2017|access-date=30 October 2020}}