· 12 min read
Why Two BaZi Calculators Disagree About Your Chart
One birth moment, three different BaZi charts. See what the day boundary, year boundary and hour clock conventions move, and how to pin the one you want.
H
Hiroshi Kagawa
I-Ching Researcher & Chinese Metaphysics Writer
Japan27 articles published
Hiroshi Kagawa has researched the I-Ching as a decision-making and divination framework for 25 years, and writes on the wider Chinese metaphysical system it belongs to: the Four Pillars of Destiny, the sexagenary cycle, and the lunisolar calendar and almanac tables that date selection is drawn from. His background in East Asian Philosophy informs his work on hexagram interpretation, day and hour boundary conventions, 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 interpretationChinese astrologyBaZiFour Pillars of DestinyChinese almanacFeng shuiFlying starsKua numbersEast Asian metaphysicsTaoist philosophyDream analysisAngel numbers
Articles by Hiroshi Kagawa
· 11 min read
Chinese Almanac Tong Shu API: Day Officer, Clash and Dates
Chinese almanac Tong Shu API: the almanac day as JSON with day officer, lunar mansion, clash animal, and a search for auspicious dates.
· 14 min read
Flying Star Feng Shui Calculator API: 10 Checks to Run
Flying star feng shui calculator API checks: ten requests that separate a real natal chart engine from a plausible one, each answered in minutes.
· 12 min read
BaZi API for Developers: Four Pillars, Three Conventions
What a BaZi API must return, and how to reproduce a published Four Pillars chart: typed day, year and hour conventions echoed on every response.
· 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.
· 24 min read
Swiss Ephemeris Explained: AGPL, CHF 700 License, Accuracy
Swiss Ephemeris is free under AGPL, or CHF 700 once for a closed-source license. What it calculates, how accurate it is, and when a hosted API is simpler.
· 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.
· 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.
· 14 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
Water Dreams: What They Mean and Why You Have Them
Dreaming about water? Explore what oceans, floods, rain, swimming, and drowning in dreams reveal about your emotions and subconscious mind.