Tech Bureau

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Tech Bureau, Corp.
Native name
Tekku Byuro Kabushiki Gaisha
TypePrivately held company
IndustryInternet and software development
FoundedJune 16, 2014; 9 years ago (2014-06-16)
FounderTakao Asayama
Headquarters1-15-18 Utsubohommachi, Nishi-ku, ,
ServicesZaif cryptocurrency exchange
Number of employees
Approx. 60 (2018)

Tech Bureau, Corp. is an internet and software development company based in Nishi-ku, Osaka, Japan.



Zaif is a cryptocurrency exchange that handles currencies including Bitcoin, Bitcoin Cash and Monacoin. As of September 2018, it was ranked as the 35th largest cryptocurrency exchange by turnover,[1] and was one of sixteen cryptocurrency exchanges licensed and regulated by the Japanese Financial Services Agency (FSA).[2]

On September 14, 2018, the exchange was hacked and the equivalent of $60 million in cryptocurrency was stolen. The hackers reportedly gained access to "hot wallets" through which the exchange held funds for immediate transactions. Tech Bureau said that it did not notice the breach until Monday, September 17, and that the breach was then promptly reported to police and the FSA.[3] The hack resulted in a suspension of withdrawals and deposits, and a bailout agreement with FISCO, a Japanese company that injected 5 billion yen in financial support to Tech Bureau.[1][2]


  1. ^ a b Reidy, Gearoid (2018-09-19). "Hackers Steal $60 Million From Japanese Crypto Exchange Zaif". Retrieved 2018-09-20.
  2. ^ a b Yuda, Masayuki (2018-09-30). "Japanese cryptocurrency exchange Zaif hacked for $60m". Nikkei Asian Review. Retrieved 2018-09-20.
  3. ^ Nagata, Kazuaki (2018-09-20). "¥6.7 billion in digital money stolen from Osaka firm". The Japan Times Online. ISSN 0447-5763. Retrieved 2018-09-20.

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