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Articles

Hand-curated reading material with vocab + quizzes.

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(15)
The Legal Framework of Personal Information Protection and Certification Systems
Purpose, Principles, and Key Definitions of the Personal Information Protection Act
Specifying/Changing Purpose of Use, Restrictions by Purpose, and Prohibition of Improper Use
Proper Acquisition, Sensitive Personal Information, and Purpose of Use Notification
Obligations Regarding Personal Data — Accuracy, Safety Management Measures, and Breach Reporting
Restrictions on Third-Party Provision — Complete Guide to Consent, Opt-Out, and Non-Third-Party Categories
Restrictions on Cross-Border Transfer, Record-Keeping Obligations, and Confirmation Duties (Articles 28–30)
Obligations Regarding Personal-Related Information (Article 31)
Topic I, Section 6: Obligations Regarding Retained Personal Data
Part 7: Pseudonymized Information (Articles 41-42)
Part 8: Obligations Regarding Anonymized Processed Information (Articles 43-46)
Part 9: Mechanisms for Ensuring Effectiveness
Part 10: Handling of Personal Information by Administrative Agencies
Chapter 11: Understanding the My Number Act pt.1 — General Provisions, Individual Numbers, and My Number Cards (Articles 1-18-5)
Chapter 11: Understanding the My Number Act pt.2 — Provision Restrictions, Protection, Supervision, and Penalties (Articles 19-57)
(7)
Fundamentals of information security and threats
Security standards and guidelines
Subject II Part 2: Organizational & Human Security (Part 1) — From basic policy formulation to risk management and regulation development
Subject II Part 2: Organizational & Human Security (Part 2) — Safety management measures, contractor oversight, and incident response
Task II Part 3: Office Security
Fundamentals of Technical Security Countermeasures
Implementation Items for Technical Safety Management Measures
(18)
Shift to Job-Based Employment: Moving Away from Membership-Type

Shift to Job-Based Employment: Moving Away from Membership-Type

Karoushi and Work-Style Reform: Overtime Regulation in Japan

Karoushi and Work-Style Reform: Overtime Regulation in Japan

Nomikai Survival: A Newcomer's Guide to Japanese Workplace Drinking Culture

Nomikai Survival: A Newcomer's Guide to Japanese Workplace Drinking Culture

Maternity & Parental Leave in Japan: Schedule and Benefits

Maternity & Parental Leave in Japan: Schedule and Benefits

Japanese New-Grad Job Hunting: ES, Mendan, Naitei

Japanese New-Grad Job Hunting: ES, Mendan, Naitei

退Taishoku-todoke vs Taishoku-negai: Resignation Letters in Japan

Taishoku-todoke vs Taishoku-negai: Resignation Letters in Japan

Telework in Japan Post-COVID: Remote, Hybrid, Return-to-Office

Telework in Japan Post-COVID: Remote, Hybrid, Return-to-Office

Job Hunting in Japan: Writing Rirekisho and Shokumu-keirekisho

Job Hunting in Japan: Writing Rirekisho and Shokumu-keirekisho

Hou-Ren-Sou — The Backbone of Japanese Workplace Communication

Hou-Ren-Sou — The Backbone of Japanese Workplace Communication

Preparing for and Reviewing Performance Evaluation Interviews

Preparing for and Reviewing Performance Evaluation Interviews

Meeting Manners and Facilitation — From Chairing to Minutes

Meeting Manners and Facilitation — From Chairing to Minutes

Business Keigo Basics — Distinguishing Sonkeigo, Kenjougo, and Teineigo

Business Keigo Basics — Distinguishing Sonkeigo, Kenjougo, and Teineigo

The Etiquette of Business Card Exchange — The Few Seconds That Decide First Impressions

The Etiquette of Business Card Exchange — The Few Seconds That Decide First Impressions

Nemawashi and Ringi — How Japanese Companies Make Decisions

Nemawashi and Ringi — How Japanese Companies Make Decisions

How to Use 1on1 Meetings — Dialogue Between Manager and Subordinate

How to Use 1on1 Meetings — Dialogue Between Manager and Subordinate

Online Meeting Etiquette — Business Manners in the Zoom Era

Online Meeting Etiquette — Business Manners in the Zoom Era

How to Write External Email — Apology, Request, Confirmation

How to Write External Email — Apology, Request, Confirmation

How to Write Internal Email — From Subject Line to Closing

How to Write Internal Email — From Subject Line to Closing

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Studio Ghibli: A 40-Year History of Miyazaki, Takahata, and Suzuki

Studio Ghibli: A 40-Year History of Miyazaki, Takahata, and Suzuki

Bonsai: The Art of Miniature Trees

Bonsai: The Art of Miniature Trees

Japanese Green Tea: Sencha, Gyokuro, Matcha and More

Japanese Green Tea: Sencha, Gyokuro, Matcha and More

Kabuki, Noh, and Bunraku: Japan's Three Great Traditional Theatres

Kabuki, Noh, and Bunraku: Japan's Three Great Traditional Theatres

Japanese Gardens: Pond, Karesansui, and Tea-Roji Styles

Japanese Gardens: Pond, Karesansui, and Tea-Roji Styles

Sake and Shochu: Production, Regions, How to Drink

Sake and Shochu: Production, Regions, How to Drink

Shichi-Go-San: Celebrating Children's Growth

Shichi-Go-San: Celebrating Children's Growth

Anime and Manga Culture and Industry Structure — The Current State of Global Expansion

Anime and Manga Culture and Industry Structure — The Current State of Global Expansion

Izakaya Culture and Kanpai Etiquette — From Otōshi to the Final Bite

Izakaya Culture and Kanpai Etiquette — From Otōshi to the Final Bite

The J.League's History and Community Roots — 30 Years Since the 1993 Launch

The J.League's History and Community Roots — 30 Years Since the 1993 Launch

Shrines vs. Temples, and How to Visit Them Properly

Shrines vs. Temples, and How to Visit Them Properly

Japanese Matsuri — Symbols of Season and Region

Japanese Matsuri — Symbols of Season and Region

Onsen Culture and Bathing Etiquette — How to Enjoy Visiting Famous Hot Springs

Onsen Culture and Bathing Etiquette — How to Enjoy Visiting Famous Hot Springs

Pro Baseball and High School Baseball — Two Faces of a National Sport

Pro Baseball and High School Baseball — Two Faces of a National Sport

Regional Ramen — Sapporo, Hakata, Kitakata, and Beyond

Regional Ramen — Sapporo, Hakata, Kitakata, and Beyond

Introduction to the Way of Tea — Sen no Rikyū and the Spirit of Wabi-Sabi

Introduction to the Way of Tea — Sen no Rikyū and the Spirit of Wabi-Sabi

The Three Ways — How Tea, Flowers, and Calligraphy Embody the Japanese Spirit

The Three Ways — How Tea, Flowers, and Calligraphy Embody the Japanese Spirit

Seasonal Events — Japan's Annual Calendar from New Year to Year-End

Seasonal Events — Japan's Annual Calendar from New Year to Year-End

Grand Sumo — Rankings and the Life of a Rikishi

Grand Sumo — Rankings and the Life of a Rikishi

寿History and Types of Sushi — From Narezushi to Edomae

History and Types of Sushi — From Narezushi to Edomae

Washoku — UNESCO Intangible Cultural Heritage and the Ichijū Sansai Meal

Washoku — UNESCO Intangible Cultural Heritage and the Ichijū Sansai Meal

(17)
Electricity, Gas, Water: Setting Up Utilities in Japan

Electricity, Gas, Water: Setting Up Utilities in Japan

Gym Memberships in Japan: Joining, Using, Leaving

Gym Memberships in Japan: Joining, Using, Leaving

Home Internet in Japan: Comparing Fiber Providers

Home Internet in Japan: Comparing Fiber Providers

Buying Property in Japan as a Foreigner: From Mortgage to Closing

Buying Property in Japan as a Foreigner: From Mortgage to Closing

Choosing a Mobile Plan in Japan: Big Carriers, MVNOs, and eSIM

Choosing a Mobile Plan in Japan: Big Carriers, MVNOs, and eSIM

Convenience Stores as Banks: ATMs, IC Cards, and Cashless Life

Convenience Stores as Banks: ATMs, IC Cards, and Cashless Life

Childcare in Japan: Subsidies, Daycare Hunting, Free Education

Childcare in Japan: Subsidies, Daycare Hunting, Free Education

Final Tax Return Basics — Salary Income, Side Jobs, and Deductions

Final Tax Return Basics — Salary Income, Side Jobs, and Deductions

Introduction to Health Insurance — National Health Insurance vs Employees' Health Insurance

Introduction to Health Insurance — National Health Insurance vs Employees' Health Insurance

Employees' Pension and National Pension — Preparing for Retirement and the Active-Worker Burden

Employees' Pension and National Pension — Preparing for Retirement and the Active-Worker Burden

Japanese Rental Contracts and Guarantor Companies — From Reikin and Shikikin to Hoshōryō

Japanese Rental Contracts and Guarantor Companies — From Reikin and Shikikin to Hoshōryō

Latest Permanent Residency Standards — Comparing the General and HSP Routes

Latest Permanent Residency Standards — Comparing the General and HSP Routes

Engineer Residence Status — How to Obtain the Engineer/Specialist in Humanities/International Services Visa

Engineer Residence Status — How to Obtain the Engineer/Specialist in Humanities/International Services Visa

Opening a Japanese Bank Account and Getting a Credit Card — Practical Guide for Foreign Engineers

Opening a Japanese Bank Account and Getting a Credit Card — Practical Guide for Foreign Engineers

Moving Checklist — Ward Office, Utilities, and Address Changes

Moving Checklist — Ward Office, Utilities, and Address Changes

Highly Skilled Professional Visa in Practice — Points System and Privileges

Highly Skilled Professional Visa in Practice — Points System and Privileges

Year-End Adjustment Mechanism — Tax Reconciliation for Company Employees

Year-End Adjustment Mechanism — Tax Reconciliation for Company Employees

(12)
How we reduced authentication platform costs by replacing Bill One's authentication with an in-house platform

How we reduced authentication platform costs by replacing Bill One's authentication with an in-house platform

Turning contracts into "decision-making infrastructure" — Creating new value with Contract One

Turning contracts into "decision-making infrastructure" — Creating new value with Contract One

Renewing Web Eight and our efforts toward a safe release

Renewing Web Eight and our efforts toward a safe release

On the Release of Sansan Data Intelligence

On the Release of Sansan Data Intelligence

Sansan Engineer Team: Infrastructure Strategy Division

Sansan Engineer Team: Infrastructure Strategy Division

Candid Talk After Joining [Technology Division, Data Strategy Department, Infrastructure Group — Yu Watanabe]

Candid Talk After Joining [Technology Division, Data Strategy Department, Infrastructure Group — Yu Watanabe]

Why people from SIer backgrounds thrive: taking on the product development that drives Sansan

Why people from SIer backgrounds thrive: taking on the product development that drives Sansan

A Development Organization That Collaborates With AI, and the Deepening of Technology — New Sansan CTO Sasakawa Speaks on His Vision

A Development Organization That Collaborates With AI, and the Deepening of Technology — New Sansan CTO Sasakawa Speaks on His Vision

Building Sansan’s Technical Platform from Kansai: An Engineer’s Challenge to Create the Future in a New Organization

Building Sansan’s Technical Platform from Kansai: An Engineer’s Challenge to Create the Future in a New Organization

The Challenge of the Platform Engineering Unit Supporting Sansan’s Company-wide Infrastructure

The Challenge of the Platform Engineering Unit Supporting Sansan’s Company-wide Infrastructure

Calmly processing vast volumes of data — that is where the impressiveness of Sansan’s infrastructure shows.

Calmly processing vast volumes of data — that is where the impressiveness of Sansan’s infrastructure shows.

OYACO — The Program Supporting Work-Childcare Balance

OYACO — The Program Supporting Work-Childcare Balance

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Kintone's Low-Code Strategy: Business Apps for Everyone

Kintone's Low-Code Strategy: Business Apps for Everyone

GREE's Mobile Game Operations: Real-time Battles and Payment Internals

GREE's Mobile Game Operations: Real-time Battles and Payment Internals

pixiv's Image CDN: Delivering Hundreds of Millions of Illustrations

pixiv's Image CDN: Delivering Hundreds of Millions of Illustrations

Eight: Sansan's Business-Card SaaS Platform Evolution

Eight: Sansan's Business-Card SaaS Platform Evolution

SmartNews Recommendation: ML for Personalized News

SmartNews Recommendation: ML for Personalized News

Yahoo! JAPAN Search: A Large-Scale Japanese-Optimized Engine

Yahoo! JAPAN Search: A Large-Scale Japanese-Optimized Engine

Cookpad's Recipe Search — Learning-to-Rank Implementation

Cookpad's Recipe Search — Learning-to-Rank Implementation

A Decade of kintone API Design — The Battle for Backward Compatibility

A Decade of kintone API Design — The Battle for Backward Compatibility

DeNA's Mobile Game Observability Platform

DeNA's Mobile Game Observability Platform

Digital Agency Government Cloud — Technical Details

Digital Agency Government Cloud — Technical Details

freee's Accounting Data Integrity — Automatic Journal Balance Verification

freee's Accounting Data Integrity — Automatic Journal Balance Verification

The Alert Design Philosophy of Mackerel

The Alert Design Philosophy of Mackerel

LINE's LLMOps — Operating Large Language Models at Scale

LINE's LLMOps — Operating Large Language Models at Scale

LINE's Large-Scale Realtime Messaging Infrastructure

LINE's Large-Scale Realtime Messaging Infrastructure

Merpay's Identity Infrastructure — Technology for eKYC and Identity Verification

Merpay's Identity Infrastructure — Technology for eKYC and Identity Verification

Mercari's Microservices Migration — From Monolith to Next Generation

Mercari's Microservices Migration — From Monolith to Next Generation

Money Forward's Multi-Tenant Design — Data Isolation and Security

Money Forward's Multi-Tenant Design — Data Isolation and Security

Recruit Data Platform Renewal — Consolidating Dozens of Services

Recruit Data Platform Renewal — Consolidating Dozens of Services