{
  "name": "Japan Research Portfolio",
  "author": "Teddy Okuyama",
  "publication": "Japan Investor Interface",
  "publication_url": "https://japaninterface.substack.com",
  "inception_date": "2026-11-02",
  "initial_capital": 10000000.0,
  "currency": "JPY",
  "cost_rate": 0.002,
  "asof": "2026-11-02",
  "updated_at": "2026-11-03T03:57:51.427808+09:00",
  "snapshot": {
    "date": "2026-11-02",
    "cash": 9900057.455058824,
    "market_value": 99588.0,
    "nav": 9999645.455058824,
    "capital": 10000000.0,
    "costs": 199.48611764705882,
    "dividends": 0.0,
    "realized": 0.0,
    "unrealized": -354.5449411764706,
    "pnl": -354.5449411764706,
    "return_pct": -0.003545449411764706,
    "index": 99.99645455058824,
    "cash_weight_pct": 99.00408469032651,
    "holdings": [
      {
        "name": "Kamakura Shinsho",
        "japanese_name": "鎌倉新書",
        "exchange": "TSE Prime",
        "research_title": "What If There’s No One to Arrange Your Funeral?",
        "research_date": "2026-10-30",
        "research_url": "https://japaninterface.substack.com/p/kamakura-shinsho-6184-what-if-theres",
        "ticker": "6184",
        "shares": 172,
        "first_date": "2026-11-02",
        "last_date": "2026-11-02",
        "cost": 99942.54494117647,
        "average_cost": 581.0613077975377,
        "mark": 579.0,
        "mark_date": "2026-11-02",
        "market_value": 99588.0,
        "unrealized": -354.5449411764706,
        "dividends": 0.0,
        "realized": 0.0,
        "entry_vwap": 579.9015047879617,
        "initial_target_pct": 1.0,
        "return_pct": -0.354748762286518,
        "contribution_pp": -0.003545449411764706,
        "weight_pct": 0.9959153096734885
      }
    ],
    "activity": [
      {
        "id": "2026-11-02-opening",
        "date": "2026-11-02",
        "type": "opening_cash",
        "amount": "10000000",
        "note": "Portfolio begins with ¥10,000,000 of hypothetical cash."
      },
      {
        "id": "2026-11-02-6184-buy-001",
        "date": "2026-11-02",
        "type": "buy",
        "ticker": "6184",
        "target_allocation_pct": "1",
        "allocation_base": "10000000",
        "shares": 172,
        "reference_price_numerator": "42390800",
        "reference_price_denominator": "73100",
        "reference_price_type": "Full-session TSE VWAP",
        "transaction_cost_rate": "0.002",
        "note": "First allocation confirmed by Teddy on November 2, after the market close. Reference-priced simulation using that session’s VWAP; not an executable intraday fill.",
        "source": "sources/6184_2026-11-02.json",
        "cash_change": -99942.54494117647,
        "effective_price": 581.0613077975377,
        "reference_price": 579.9015047879617,
        "gross_value": 99743.05882352941,
        "transaction_cost": 199.48611764705882
      }
    ]
  },
  "history": [
    {
      "date": "2026-11-02",
      "nav": 9999645.455058824,
      "cash": 9900057.455058824,
      "market_value": 99588.0,
      "return_pct": -0.003545449411764706,
      "index": 99.99645455058824,
      "dividends": 0.0,
      "costs": 199.48611764705882
    }
  ]
}