Add Japanese translation of DeFi section

[mintlify]

Summary

• Added Japanese (ja) translations for all 40 pages under the DeFi section
• Added ja language entry to docs.json navigation with matching structure to en/cn/ko DeFi sections

Pages translated

• Main pages: Overview, Bridge, Staking, Governance, Community Buyback, Transactions, Gas and Fees
• Wallet: Overview, Create a wallet, Accounts
• Trading: Overview, Order Types, Fees and Rebates, 24/5 Equity Feeds, Margin Trading, Liquidation, Funding Rates, Performing Liquidations, Derivatives (Perpetuals, Expiry Futures, Election Perpetual, Pre-Launch Futures, Index Perpetual Futures, iAssets)
• Token Standards: Overview, INJ Coin, Token Factory, CW20 Standard
• Open Liquidity Program: Introduction, Epochs, Eligibility, Scoring, Formula Parameters, Reward Allocations, Flexible Reward Allocations, Reward Disbursements, Performance Tracking, VRMs, Fee Tiers

Translation guidelines followed

• Technical terms (Injective, INJ, USDT, Cosmos SDK, TokenFactory, etc.) kept in English
• Formal Japanese tech documentation tone
• Doc structure matches English docs exactly
• All MDX components, math formulas, code blocks, and tables preserved

[mintlify]

Preview deployment for your docs. Learn more about Mintlify Previews.

Project	Status	Preview	Updated (UTC)
injective_docs	🟢 Ready	View Preview	Mar 24, 2026, 6:40 AM