Share this article

Mt Gox CEO Mark Karpeles Claims Innocence as Trial Nears End

In his closing arguments in a Tokyo court, Mark Karpeles, former CEO of collapsed bitcoin exchange Mt. Gox, said he did not embezzle funds.

Updated Dec 10, 2022, 8:02 p.m. Published Dec 27, 2018, 10:30 a.m.
Mark Karpeles

In his closing arguments in a Tokyo court, Mark Karpeles, former CEO of collapsed bitcoin exchange Mt. Gox, has restated his innocence in the events that saw the firm lose millions in customer funds and ultimately go bankrupt.

He faces charges of embezzling approximately 340 million yen (over $3 million) from the exchange and fraudulently manipulating Mt. Gox data.

STORY CONTINUES BELOW
Don't miss another story.Subscribe to the Crypto Daybook Americas Newsletter today. See all newsletters

On Thursday, Karpeles apologized for his failure to protect users' cryptocurrency from hacking, but stressed he was not guilty on all charges presented in court, according to Japanese broadcaster NHKhttps://www3.nhk.or.jp/news/html/20181227/k10011761411000.html.

Once the world’s largest bitcoin exchange by trading volume, Mt. Gox collapsed in early 2014 after it was revealed that the exchange had lost over 800,000 bitcoin at a valuation of $480 million at the time (though some were apparently later found in a hardware wallet). The case got underway in June of this year, with Karpeles having been released on bail in 2017 on the condition he does not leave Japan. He also denied the charge of embezzlement at the time.

While Karpeles isn't accused over the hacking losses, prosecutors claim he transferred 340 million yen belonging to customers from a Mt. Gox account to his personal account between September and December 2013, according to a court indictment. Karpeles, they allege, took the cash for uses such as investing in a software development business.

Karpeles is also accused of manipulating data on Mt. Gox’s trading system to inflate the exchange's balances.

In the trial, his defense team argued that the transfer of money to his own account was carried out as part of the exchange's business, NHK indicates.

Originally facing up to five years in prison, prosecutors are now seeking a 10-year sentence, it was reported earlier this month. The court is expected to announce a verdict on March 15, 2019.

Mark Karpeles image via CoinDesk archive

More For You

Protocol Research: GoPlus Security

GP Basic Image

What to know:

  • As of October 2025, GoPlus has generated $4.7M in total revenue across its product lines. The GoPlus App is the primary revenue driver, contributing $2.5M (approx. 53%), followed by the SafeToken Protocol at $1.7M.
  • GoPlus Intelligence's Token Security API averaged 717 million monthly calls year-to-date in 2025 , with a peak of nearly 1 billion calls in February 2025. Total blockchain-level requests, including transaction simulations, averaged an additional 350 million per month.
  • Since its January 2025 launch , the $GPS token has registered over $5B in total spot volume and $10B in derivatives volume in 2025. Monthly spot volume peaked in March 2025 at over $1.1B , while derivatives volume peaked the same month at over $4B.

More For You

Dogecoin Hovers Near Key Support as Fed Easing Fails to Spark Risk Rally

(CoinDesk Data)

Despite elevated trading activity, Dogecoin faces resistance near $0.1425, and its future movement is likely dependent on broader market sentiment.

What to know:

  • The Federal Reserve's 25-basis-point rate cut has led to mixed market reactions, with Dogecoin trading quietly within its established range.
  • Dogecoin's price remains stable between $0.13 and $0.15, with whale wallets accumulating significant amounts of the cryptocurrency.
  • Despite elevated trading activity, Dogecoin faces resistance near $0.1425, and its future movement is likely dependent on broader market sentiment.