Ethereum, ranked second by market cap after Bitcoin, is a revolutionary blockchain platform that enables smart contracts and decentralized applications (dApps), accelerating the fusion of finance and technology. Influencers have played a crucial role in promoting Ethereum and Web3 in Japan. The platform's unique features, continuous upgrades, and practical applications in DeFi and NFTs solidify its significance in various sectors, while ongoing challenges remain in scalability and regulation. Future advancements promise a vibrant decentralized internet.