イーサリアム on Mainnet.jp

Role of Layer 2 (Arbitrum, Optimism etc.) and Gas Fee Savings

Tue, 16 Jun 2026 14:20:00 +0900

As users on Ethereum multiply, the network faces high gas fees and slow transactions. The leading technology engineered to solve this scaling bottleneck is “Layer 2” (L2). We examine L2 networks like Arbitrum and Optimism and check how they cut fees.

Ethereum’s Scaling Bottleneck

Prioritizing decentralized security, Ethereum’s base layer (L1) processes limited transactions per block, causing gas fees to spike to tens of dollars during high traffic.

The Layer 2 Architecture

L2 networks process transaction logs off the Ethereum main chain, roll them up into batches, and post only compressed proofs back to L1 (via Rollup technology).

What is a Smart Contract? Learning Ethereum's Innovation

Mon, 15 Jun 2026 14:10:00 +0900

While Bitcoin operates as peer-to-peer electronic money, Ethereum’s breakthrough was introducing “Smart Contracts.” We explain how this automated contract technology works and examine the innovations it enables.

What is a Smart Contract?

A smart contract is a self-executing software program running on public ledgers that enforces logic rules: “If X condition is met, automatically execute Y action.”

Everyday Analogy: Vending Machines: Inserting coins and pressing a button (Condition) triggers the release of a drink (Action) without a human salesperson.

The Blockchain Edge

Running these agreements on decentralized chains generates massive efficiency gains:

Thorough Comparison of Bitcoin (BTC) and Ethereum (ETH)

Tue, 26 May 2026 13:05:00 +0900

Representing the top two crypto assets by market capitalization, Bitcoin (BTC) and Ethereum (ETH) are distinct assets. Though both are cryptocurrencies, their underlying philosophies and use cases are vastly different. We compare these two crypto pillars.

1. Bitcoin (BTC): Digital Gold

Launched in 2009, Bitcoin was engineered as a decentralized, peer-to-peer electronic cash system.

Objective: Store and transfer of value (Digital Gold).
Supply Cap: Strictly capped at 21 million coins, guaranteeing digital scarcity.

2. Ethereum (ETH): Decentralized Supercomputer

Ethereum is a developer platform designed to run decentralized applications and smart contracts.

Ethereum's Major Upgrade 'Dencun' Outline and Effects

Sun, 19 Apr 2026 14:55:00 +0900

Ethereum’s “Dencun” hard fork upgrade is a major milestone in the network’s scaling roadmap. Introducing Proto-Danksharding, it targets Ethereum’s high gas fees. We explain the mechanics and impact of this upgrade.

The Core Feature: EIP-4844

Dencun’s central improvement is EIP-4844 (Proto-Danksharding).

The “Blob” Data Space: Previously, Layer 2 networks posted data into Ethereum’s expensive call data storage. EIP-4844 creates temporary data packages called “Blobs” that expire after a few weeks, drastically reducing mainnet data verification costs.

Layer 2 Fees Plummet 90%+

With Blobs active, transaction costs on L2 networks (like Arbitrum, Optimism, and Base) plummeted by over 90%. Users can interact with smart contracts for fractions of a cent, eliminating a major user-experience barrier for dApps.