10 min read·
Human Design API: Type, Strategy and Authority Guide
A developer guide to the Human Design API: get type, strategy, and authority from one call, plus the full bodygraph from a birth date and time.
Hiroshi Kagawa
I-Ching Researcher & Dream Analyst
Japan
Hiroshi Kagawa has researched the I-Ching as a decision-making and divination framework for 25 years. His background in East Asian Philosophy informs his work on hexagram interpretation and dream symbolism in Buddhist and Taoist traditions. He is currently preparing a modern commentary on the I-Ching that ties classical hexagram readings to contemporary decision frameworks.
East Asian Philosophy background25 years of researchWriting a modern I-Ching commentary
I-ChingHexagram interpretationDream analysisAngel numbersEast Asian metaphysicsTaoist philosophy
32 articles published
Articles by Hiroshi Kagawa
12 min read·
How Human Design Bodygraph Charts Work: Full Guide
A complete reference on the Human Design bodygraph: nine centers, 64 gates, 36 channels, definition, the two data sets, types, and authority.
21 min read·
Swiss Ephemeris Explained for Developers: The Engine Behind Astrology Software
What is the Swiss Ephemeris, how does it calculate planetary positions, and why does every serious astrology app depend on it? A technical deep-dive for developers.
8 min read·
Biorhythm Critical Days: What Zero Crossings Mean
Biorhythm critical days occur when cycles cross zero. Learn about single, double, and triple critical day severity and how to track them with an API.
15 min read·
AI Agents Calling Real APIs: How Tool Calling and MCP Work in Practice
See how AI agents actually call APIs in production. Real examples of OpenAI function calling, Claude tool use, Gemini ADK, and MCP with request/response flows and code you can run today.
11 min read·
I-Ching API for Developers: Hexagrams and Book of Changes
Build I-Ching apps with a production hexagram API. 64 hexagrams, 384 changing lines, trigrams, three-coin casting, and daily oracle readings.
11 min read·
Dream Interpretation API: Build Apps with 2,500 Symbols
Build dream journal apps, AI dream chatbots, and wellness features with a structured dream symbol database API. 2,500+ symbols, 5 endpoints, JSON output.
15 min read·
Navamsa Chart (D9): How to Read the Marriage and Spouse Prediction Chart in Vedic Astrology
Learn how to read the Navamsa (D9) chart for marriage prediction, spouse characteristics, and spiritual growth. Understand Vargottama, the 7th house, Venus and Jupiter placement, and Navamsa Lagna.
13 min read·
KP Astrology: The Complete Guide to Krishnamurti Paddhati, Sub-Lords, and Horary Predictions
Master KP (Krishnamurti Paddhati) astrology with this definitive guide. Learn the 249 sub-lord system, significator analysis, cuspal sub-lords, ruling planets, and horary prediction technique.
16 min read·
Divisional Charts in Vedic Astrology: Understanding D1 to D60 Varga Charts for Life Area Analysis
Master the 16 Shodasha Varga divisional charts from D1 Rashi to D60 Shashtiamsa. Learn which Varga reveals career, marriage, wealth, children, and past life karma in Jyotish.
13 min read·
Planetary Transits (Gochar) in Vedic Astrology: How Moving Planets Trigger Life Events
Learn how planetary transits (Gochar) work in Vedic astrology. Understand Saturn transit (Sadhesati), Jupiter transit, Rahu-Ketu axis shifts, and how to read transit charts against your birth chart for predictions.
10 min read·
Caching Astrology API Data: Save 95% of API Calls Without Losing Freshness
How to cache astrology, tarot, numerology, and dream API responses effectively. TTL strategies, cache key patterns, and architecture for serving millions from minimal API calls.
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