Crypto & Cashless

Settling up with crypto and cashless payments — wallets, stablecoins, and new ways to send money.

cryptocurrencysecurity

How to Choose a Hardware Wallet — Securing Your Crypto in Japan

A beginner's guide to hardware wallets for cryptocurrency. From the $3.4B stolen in 2025 hacks to comparing Ledger vs Trezor and managing recovery phrases safely, learn how to take control of your crypto security.

cryptostablecoin

How to Settle Group Expenses With Crypto: A Practical Stablecoin Guide

A hands-on guide to settling shared expenses with cryptocurrency. Learn how stablecoins remove price-swing risk, how to choose low-fee chains, what to know about taxes and irreversible transfers — based on real experience building crypto settlement into WariSaku.