[Good First Issue] 🎋 Add new Japan Fact 296 - Beginner-Friendly Contribution (good-first-issue, <1 min, no setup)

## 🟢 Good First Issue: Add Japan Fact #296 — Beginner-Friendly Open Source Contribution ![Time: 🟢 **No prerequisites needed!** You don't need to clone the repo, install anything, or write code.

> This entire contribution can be done from your browser in under 60 seconds. **Labels:** good first issue, help wanted, hacktoberfest **Language:** JSON (no coding required) **Time:** The word 'yuruyaka' (ゆるやか) means gentle or gradual, often used to describe soft slopes or slow changes. ### 📝 Instruct