Japan Stock Calculator

About Japan Stock Calculator

Japan Stock Calculator is the ultimate companion app for trading on the Tokyo Stock Exchange (TSE). Whether you trade Prime, Standard, or Growth market equities, this app helps you calculate exact buy costs, analyze potential sell profits, and manage your trade history with ease.

KEY FEATURES:

1. REAL-TIME BUY & SELL COST CALCULATOR
- Instantly compute total amount payable, broker commission, and average share cost as you type.
- Configure custom commission rates (e.g., 0.015% for online brokers) with optional minimum fee floor.
- Thousands-separator formatting (¥1,234,567) for clear, readable results.

2. OFFICIAL TSE STOCK SEARCH & AUTO-FILL
- Built-in database of all Tokyo Stock Exchange (TSE) listings.
- Fast autocomplete search by stock name or 4-digit ticker code (e.g., 7203 for Toyota Motor Corp).
- Automatic market segment detection: Prime, Standard, and Growth markets.
- Full TOPIX 100 index identification support.

3. DYNAMIC PROFIT & LOSS SCENARIO ANALYSIS
- Automatically generates selling price scenarios stepped up (+20 ticks) and down (-20 ticks) from your buy price.
- Complies with official TSE tick-size tables — from ¥0.1 for TOPIX 100 large-caps under ¥5,000 to ¥100,000 for high-priced equities.
- Real-time P&L calculations in absolute Yen (¥) and percentage (%).
- Color-coded results: Red for profits, Blue for losses, Yellow for break-even price.

4. LOCAL TRADE HISTORY & PERSISTENCE
- Save your buy transactions securely on your device using a local Room database.
- One-tap Reload & Recalculate to instantly load past trades back into the calculator.
- Swipe-to-delete for easy history management.

5. MODERN MATERIAL 3 DESIGN
- Clean, professional UI built with Material 3 design guidelines.
- Adaptive layouts optimized for one-handed use in portrait mode.
- High-contrast typography readable in all lighting conditions.

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JAPAN MARKET FEE MODEL:
- Broker Commission: Custom % with optional minimum fee floor
- Exchange Fee: 0% (bundled into broker commission by Japanese brokers)
- Transaction Tax: 0% (abolished April 1999)
- Stamp Duty: None
- Capital Gains Tax: Handled annually — not deducted at trade time

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PRIVACY & DISCLAIMER:
- 100% Offline calculation — your data stays on your device.
- Built-in UMP Consent Management for ad compliance.
- Reference Tool Only: Confirm actual charges with your broker before trading.

Download Japan Stock Calculator now and trade TSE stocks with confidence!