Blockchain can store records, but they don't have the ability to bring in external information themselves. Oracle plays an important role as a system that brings information to the blockchain system.

Hyperledger is also involved with large companies such as IBM. An article about Fujitsu was posted previously, yet Japanese companies such as Sony, Hitachi, Fujitsu and NTT are also paying attention to Hyperledger. Although Hyperledger is a blockchain platform, it does not issue currencies like bit coins or Ethereum. This article will explain in detail about Hyperledger.

While overseas companies are using blockchain technology one after another, the use of block chain technology can also be seen within major Japanese companies. This article will look at Japan's representative company Fujitsu (FUJITSU) in its field of utilizing blockchain technology.

Rethink about the storage of virtual currency about in Japan. Two hacking incidents were reported from two major domestic exchanges during this year. Multiple incidents were also reported in many countries during last year, and the momentum does not seem to be declining. There are many people who feel resistant towards keeping their own assets in the exchange since wallets stored in exchanges appeared to be a big target of hacking. It is said that wallets of exchanges were often left open in order to trade immediately without consuming the time of opening it up. While dealing with virtual currency, wallet's significance is large, and users need to acquire knowledge relating to wallets.

TokenPocket is a completely Japan-made smartphone application designed for the Ethereum・ERC20 token. Able to be used on iPhones, unlike MyEtherWallet, the ease to manage the wallet simply by a smartphone application is one of the greatest attractions of tokenPocket. This article will introduce the registration procedure of tokenPocket and explain how to use it.