Dewji's conglomerate, the METL Group, operates in over 35 industries such as trading, agriculture, manufacturing, energy, petroleum, financial services, mobile telephony, infrastructure and real estate, transport, logistics and distribution.
According to Dar es Salaam Regional Commissioner Paul Makonda, two of the attackers are believed to be foreign nationals.
Police have already made some arrests.
Unlike Mr Lissu, Mr Dewji, who served as a ruling party MP until 2015, has been careful to demonstrate his loyalty to Tanzania's increasingly authoritarian leader on numerous occasions.
Two of the kidnappers were white men, he added. "They (the four were masked individuals) fired one bullet in the air and all the hotel security guards ran away", he said.
Celebrities Demand Global Action to Combat Mental Health Stigma
According to World Health Organization , half all the mental illnesses begins by age 14 and often goes undetected and untreated. The suicide that was occurring in the country is now on the rise and most leading cause of death among young people .
Over 70% of LGBTQ+ People Experience Mental Health Issues Due to Work
The goal is to get people talking about mental illness, end the stigma, and encourage people who need help to speak up. The construction company has introduced mental health first aiders to its sites across Wales and the West.
Hurricane Michael leads to unimaginable destruction: 17 chilling photos
Forecasters say Michael was upgraded to a Category 2 storm Tuesday morning, and it could make landfall as a Category 3. Patricia Mulligan said she survived Hurricane Andrew in 1992, only to encounter the wrath of another storm Wednesday.
Dewji was the first Tanzanian to be featured on the cover of Forbes Magazine in 2013 and has been featured on three separate occasions.
An Uber driver nearby said when Mr Dewji appeared, the auto parked inside flashed lights before the two white men alighted from their vehicle and went straight to where Dewji was.
Dewji is also the main shareholder in Tanzania's Simba FC football club. "They then drove quickly from the area and headed towards Masaki", he said.
Mr Dewji, who at 43 is Africa's youngest billionaire, is in effect Tanzania's only oligarch.
Dewji runs MeTL, a multi-establishment company operating in six African countries which was founded by his father in the 1970s.