Check Karpeles was CEO of MtGox when it fell in 2014, after the loss of 850,000 bitcoins, at that point worth about $0.4bn (£0.3bn).
In its insolvency recording, MtGox faulted the misfortune for programmers.
It later said it had discovered 200,000 bitcoins in old advanced wallets.
The arraignment guarantees that Mr Karpeles exchanged 341 million yen ($3 million) from a MtGox account into a record enrolled in his own name amid the last quarter of 2013.
Bitcoin boss charged in Japan
MtGox finds 200,000 lost bitcoins
Mr Karpeles’ legal counselors deny this was misappropriation.
“I pledge to God that I am guiltless,” he is accounted for to have told the court.
Today, one bitcoin is worth £1,800, or $2,300, yet the advanced cash is famously unstable.
How Bitcoin functions
To handle bitcoin exchanges, a technique called “mining” must occur, which includes a PC taking care of a troublesome numerical issue with a 64-digit arrangement.
For every issue fathomed, one square of bitcoins is handled. Moreover, the mineworker is remunerated with new bitcoins.
Confirming bitcoin exchanges takes a great deal of PC control
This gives a motivating force to individuals to give PC handling energy to take care of the issues.
To make up for the developing energy of PC chips, the trouble of the riddles is changed in accordance with guarantee a constant flow of new bitcoins are created every day.
There are right now around 15 million bitcoins in presence.
To get a bitcoin, a client must have a Bitcoin address – a string of 27-34 letters and numbers – which goes about as a sort of virtual post-box to and from which the bitcoins are sent.
Since there is no enlist of these addresses, individuals can utilize them to ensure their secrecy when making an exchange.
These addresses are thusly put away in Bitcoin wallets, which are utilized to oversee funds.
They work like secretly run ledgers – with the stipulation that if the information is lost, so are the bitcoins possessed.