This message is being sent to all customers as it contains important information regarding transactions.
 
Dear Customer,
 
Thank you for using bitFlyer.
 
bitFlyer, Inc. (Head Office: Minato-ku, Tokyo; CEO: Yuzo Kano; hereinafter “bitFlyer”) will be supporting the Polkadot (DOT) network migration to the new Polkadot Asset Hub network. Customers will remain able to use bitFlyer’s deposit and withdrawal services for DOT after the migration.
 
Due to this update, DOT deposits, withdrawals and Recurring Buy will be temporarily suspended starting today. Please make sure to carefully review the important notes below.
 
Overview of the Migration
The DOT deposit and withdrawal network (blockchain) will be migrated as follows:
 
Before Migration: Polkadot
After Migration: Polkadot Asset Hub

Your existing deposit address itself (alphanumeric string) will remain unchanged.
 
Suspension Schedule
Tuesday, November 4th, 2025, approx. 11:00 am (JST)
Please note that from Monday, November 3rd, it will no longer be possible to configure new Recurring Buy settings for DOT.
 
Please be aware that deposits sent to the previous Polkadot network address after the suspension time will not be credited to your account, even after services resume.
 
Resumption Schedule
To be determined.
We will notify customers once the migration is complete and network stability has been confirmed.
 
Important Notes
Following the suspension time, DOT transfers to the previous Polkadot network will no longer be supported. Transfers to the old network cannot be recovered and will lead to a total loss of funds.

- After services resume, bitFlyer will only handle DOT on the Polkadot Asset Hub network. bitFlyer will not be liable for any loss of crypto assets resulting from deposits or withdrawals made via networks other than Polkadot Asset Hub.

- Please ensure that any previously registered Polkadot network addresses in your private wallet or with external exchanges are deleted, and refrain from sending DOT to those addresses.

- For more details on the DOT network upgrade, please visit the official Polkadot website below.
 
Polkadot Official Website:
 
About the bitFlyer Group

Founded in 2014 with the mission to "Simplify the World with Blockchain", bitFlyer has achieved the No. 1* in Bitcoin trading volume in Japan for nine consecutive years thanks to the patronage of its customers. The company has developed its crypto asset trading business globally with its group companies bitFlyer USA, Inc. and bitFlyer EUROPE S.A. bitFlyer Blockchain, Inc. has developed and is offering its proprietary blockchain platform, Miyabi, which is being utilized as the underlying infrastructure for tokens listed on crypto asset exchanges. Additionally, Custodiem, Inc. is preparing to launch a new crypto custody business, anticipating the increasing demand from institutional investors entering the crypto asset market. By harnessing synergies across the group to expand globally within the web3 ecosystem, the Group is striving to become Asia's leading web3 company.

Official website: https://bitflyer.com
*Annual trading volume, including contract for difference trading and futures trading, among domestic crypto
 asset exchange operators from 2016 to 2024.
(This data was aggregated by bitFlyer based on statistical information published by the Japan Virtual and
 Crypto assets Exchange Association and trading data disclosed by domestic crypto asset exchange
 operators. For the statistical information from the Japan Virtual and Crypto assets Exchange Association,
 data from 2018 onwards was referenced.)
 
 
Disclaimer (Please read carefully):

- Crypto assets are not a legal tender.
- Crypto assets may be used to settle a payment only in the event that the person receiving the payment
  agrees.
- Buying/selling crypto assets or exchanging them for other crypto assets are transactions which may result
  in losses incurred from price fluctuations of crypto assets. It is possible that the price of crypto assets
  declines due to influences from changes in balance of supply and demand, trends on prices of goods,
  currencies and other markets, as well as changes in situation related to crypto assets.
- Trading with over-the-counter crypto asset derivatives may cause losses, because their trading price may
  fluctuate in either way due to influence from changes in balance of supply and demand of over-the-counter
  crypto asset derivatives on our platform as well as indirect influence from price changes of the crypto
  assets referred by those over-the-counter crypto asset derivatives.
- Over-the-counter crypto asset derivative trades are trades in which the notional amount, which is the
  product of the trading price and the open interest volume, can be larger than the amount of the margin
  deposit. Therefore, the amount of loss incurred may be larger than the amount of margin deposit if the
  notional amount fluctuates to a greater extent than the amount of margin deposit to your disadvantage due
  to changes in balance of supply and demand of over-the-counter crypto asset derivatives or price
  fluctuations of the crypto assets referred by the derivatives.
- The margin deposit size for over-the-counter crypto assets derivatives must be no less than 50% of the
  notional amount, while the notional amount must be no more than 2 times the margin deposit. (Both for
  individual customers.) More information can be found on our “What is bitFlyer Crypto CFD?” page.
- When making purchases or sales of crypto assets on Buy/Sell, or exchanging them for other crypto assets,
  customers bear the spread. The spread is the difference between the purchase and selling prices. The fees
  incurred when buying or selling crypto assets, exchanging them for other crypto assets or over-the-counter
  crypto asset derivatives as well as the calculation methods for the corresponding fees can be found on our
  “Fees and Taxes” page.
- Over-the-counter crypto asset derivatives are negotiated transactions between you and bitFlyer, Inc. which
  is the counterparty for you on those derivatives.
- You should thoroughly read and understand all of our documents that require user agreement. Trade at
  your own risk and judgment.


bitFlyer, Inc.
Director-General of the Kanto Finance Bureau No. 00003
Financial Instruments Business Kanto Local Finance Bureau (FIBO) No. 3294
Member of Japan Virtual and Crypto assets Exchange Association, which is Certified Association for Payment Service Providers as well as Financial Instruments Firms Association
 
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*If you are not the intended recipient, or should you have any questions, please contact us from the link below.
bitFlyer, Inc.
〒107-6230 Midtown Tower 9-7-1 Akasaka, Minato-ku, Tokyo
Director-General of the Kanto Finance Bureau No. 00003
Financial Instruments Business Kanto Local Finance Bureau (FIBO) No. 3294
Member of Japan Virtual and Crypto assets Exchange Association, which is Certified Association for Payment Service Providers as well as Financial Instruments Firms Association
General Inquiries (only available in Japanese): 03-6434-5864
Contact Form: https://bitflyer.com/en-jp/contact
© 2025 bitFlyer, Inc.