Major websites

  • – A blockchain platform designed and built by Charles Hoskinson and a talented team of IOHK.It is safe, scalable, and designed to be robust enough to support fundamental changes.
  • IOHK – (Currently IOG) The research content including numerous papers and the blog where you can know the future of Cardano have been updated.We also support Japanese.IOHK Technical SupportHas useful information as a user.
  • Cardano Foundation – The Cardano Foundation will work to popularize and standardize Cardano.
  • Emurgo – We invest in and support startups and venture companies related to Cardano.
  • Cardano Docs – Useful documentation.
  • Roadmap – They are named Byron, Shelley, Goguen, Basho, and Voltaire, depending on the stage of development.
  • Essential Cardano – The Cardano portal is a collection of various media and links.

Cardano recommended videos

A Japanese subtitled version of TED Talk posted in 2014.How can blockchain and smart contracts solve the financial problems of hundreds of millions of people?

Whiteboard posted in 2017.Japanese subtitled version. How will Cardano solve the scalability, interoperability, and sustainability issues of Bitcoin and Ethereum? Cardano’s great strengths are peer-reviewed papers and high-quality guaranteed code.

Cardano overview

First Generation of Cryptocurrencies: Bitcoin
The problem that Bitcoin tried to solve was whether it was possible to create rare and tradable decentralized money by using blockchain without a trusted third party or a trusted intermediary.

First 2nd Generation Blockchain: Ethereum
Actual remittance is not just a transfer of money, but there are terms of use.
There are contracts and conditions such as “If you mow my lawn, you will only pay if you mow it" and “If you repair the roof, you will only pay".
At Ethereum, contract information and processing can be written to the blockchain as a program called smart contract.
When Alice sends money to Bob, all these conditions can be embedded in the transaction and executed.

3rd Generation Blockchain: Cardano
It was not possible to scale from millions of users to tens of millions of users on Ethereum.
All cryptocurrencies, including Ethereum, are struggling with governance.It splits like Ethereum and Ethereum Classic, Bitcoin and Bitcoin Cash to resolve disagreements.
Sustainability issues are also important. What should I do with the funds to develop the chain and build the ecosystem when the funds for the project by ICO are exhausted?

Cardano is being developed to solve these challenges.
While utilizing the functions and experience cultivated through the 1st and 2nd generations, we will add many new concepts and technologies at the same time.

Features of Cardano

  • All scientific and academic papers that lead to the solution of various problems have been peer-reviewed.
  • We have adopted the same method as the development of Shinkansen and jet engines, where system malfunctions can lead to casualties, and we have adopted a highly guaranteed code implementation method.

1: Scalability

The more participants you have in your network, the more transactions you have and the more data you have.
Blockchain is expected to store data permanently.
Therefore, the important point is how many transmissions and receptions can be recorded and transactions can be included in the block within a certain period and can be handled sustainably.

Ouroboros is backed by a provable peer-reviewed white paper.It is one of the most efficient consensus protocols with a focus on security.It has a modular design that assumes expansion.

While Bitcoin requires a lot of computer resources to form blocks, we choose slot leaders from a pool of random numbers that can be elected.
These slot readers perform exactly the same functions as Bitcoin miners, so they can be operated at a very low cost without compromising security levels.In that respectGreen blockchainIt can be said.
In addition, slot readers can maintain different blocks and different chains at the same time with the same level of security.

2: Interoperability

Communicating with different systems such as Ethereum and traditional banking networks.
If they do not have common means, the value will be subdivided.

Cardano emphasizes interoperability, such as the ability to move and use Ethereum-created tokens to the Cardano ecosystem, for example with an ERC20 converter.We will build a cross-chain platform that allows reverse movement of Ethereum from Cardano.
Bitcoin, Ethereum remains, banks untouched, Cardano provides a bridge between them.

3: Sustainability

Cardano’s blockchain is an open and free infrastructure, like the internet.
Therefore, there is a problem of how to continuously raise funds when maintaining and expanding functions.
When a company invests, it is good in the short term, but there are also problems such as the company having power in the long term.

Cardano will introduce a treasury system to deposit money in decentralized bank accounts and increase funds through inflation.
Project catalysts can make project proposals and fund good proposals by democratic voting.
Because of this process, we will consider better improvements and prevent splitting like Bitcoin, Bitcoin Cash.

Article introduction


  • Distributed Ledger: A common database owned by the servers that generate the blockchain. Information such as transmission and reception of ADA is written, it cannot be tampered with, and it will not be rewritten forever in the future.


  • Daedalus wallet – Cardano’s full node wallet.It is a desktop type and synchronizes with the blockchain.Various functions are implemented as well as remittance and delegation to the stake pool.You can always keep your money safe.
  • Yoroi Wallet – A light wallet for Cardano.You don’t need to download the blockchain to open the wallet.Therefore, you can send and receive transactions immediately.You can select the pool to delegate the stake to.A mobile version has also been released.


  • Adapools – As a unique point, the function of linking with the stake pool is substantial.There is also a smartphone app provided.
  • PoolTool – A simple yet powerful tool for multinationals.There is also a smartphone app provided.
  • Cardanoscan – You can see the statistics at a glance in an easy-to-read layout.
  • Poolpeek – It is a tool that can reach the itch, such as searching by specifying conditions, physical position of the pool, etc.
  • – You can visually enjoy watching the flow of ADA and block generation.You can also connect to the wallet and delegate.


  • SPO Japan Guild – I am indebted to the SPO management, but there is more information exchange.I am always learning.There is also a wonderful cycle in which new SPOs teach each other.There are various activities such as online meet-up.The site displays a list of pools whose operations have been confirmed at regular intervals.If you want to support Japanese pools, why not look for a delegated pool here?
  • Alliance – An alliance that supports small pools.By becoming a co-owner, we help small pools start up.There are many English-speaking people, but the SUGAR stake pool has been indebted for more than half a year. If you are interested in alliances at SPO, you may be able to expand the world by participating.
  • Cardano Hubs – We contacted you on Twitter and registered. You can list various activities related to Cardano such as Stakepool and Artist.
  • Super Secret Group – When I didn’t know how to start running a stake pool, I learned a lot from this group and was able to generate my first block.I will never forget the excitement at that time. It is a rush temple of the operator run by Cardano Guru.
  • Cardanocube – Lists dApps and projects created on Cardano.It is categorized and the whole picture is easy to see at a glance!There is also an overview of each project.

Mainnet event

The date is Japan time (UTC + 9).

2020/7/29Shelly main net started
2020/8/13First block generation in public
2020/12/7Change parameter K = 500Saturation level of stake pool is about 64M.
202012/17Allegra hard forkToken locking
2021/3/2Mary hard forkMulti-asset
2021/4/1Parameter d = 0Block generation is fully decentralized
2021/9/13Alonzo hard forkSupports smart contracts
2021/12/2Parameter adjustmentBlock size 72KB etc.
UndecidedChange to K = 1000?Saturation level of stake pool is about 31M.
UndecidedParameter changea0 change?Change the lowest fixed cost?Change the reward calculation formula?
Scheduled for summer in 2022Vasil hard forkSmart contract optimization

Stake pool operation