Blog Articles

Discover the latest updates, usage guides, and case studies for Amida-san.

Ghost LegFairnessTeam SelectionComparisonRandom Generator

Ghost Leg vs Random Number Generator: Which is Fairer for Team Selection?

Compare Ghost Leg and Random Number Generators for team selection. Learn which method provides better transparency, fairness, and trust for your online events. Mathematical proof and practical comparison included.

Online Prize DrawingVirtual RaffleEvent ManagementFair LotteryBest Practices

How to Run Fair Prize Drawings for Online Events: Complete Guide

Master the art of fair online prize drawings with our complete guide. Learn best practices, common mistakes to avoid, and step-by-step instructions for transparent virtual raffles and giveaways.

Virtual Team BuildingRemote TeamsGhost LegTeam ActivitiesOnline Games

10 Creative Ways to Use Ghost Leg for Virtual Team Building

Discover 10 innovative virtual team building activities using Ghost Leg (Amidakuji). Perfect for remote teams, online icebreakers, and engaging team events. Step-by-step guides included.

MathematicsStatisticsFairnessScientific Proof

How to Scientifically Prove Lottery Fairness【Understanding Randomness Through Mathematics and Statistics】

Mathematically and statistically proving the fairness of amidakuji. Scientifically explains why amidakuji is the fairest lottery method from the perspectives of equal probability, independence, and unpredictability.

Trouble PreventionComplaint AvoidanceEvent ManagementFailure Cases

10 Lottery Event Failure Cases and Countermeasures [Trouble Avoidance & Complaint Prevention Manual]

A comprehensive guide to 10 common lottery event failure cases and their countermeasures. A practical manual for preventing troubles and avoiding complaints.

Premiums ActLawComplianceCorporate Events

Legal Considerations for Prize Lotteries [Complete Guide to Japan's Premiums and Representations Act]

A comprehensive guide to legal considerations when conducting prize lotteries in Japan. Detailed explanation of the Premiums and Representations Act, Fair Trade Commission guidelines, illegal cases, and compliance measures.

lottery methodscomparisonroulettepaper lottery

Roulette vs Paper Lottery vs Amidakuji: Complete Comparison of Lottery Methods - Fairness, Transparency, and Usability

Compare major lottery methods including roulette, paper lottery, amidakuji, and random selection tools based on fairness, transparency, and usability. Find the best method for your scenario.

SecurityPrivacyPersonal Data ProtectionData Protection

Choosing Security and Privacy-Focused Lottery Tools【Complete Personal Data Protection Guide】

Security and privacy checkpoints when selecting online lottery tools. Explains how to conduct safe lotteries in compliance with Japan's Personal Information Protection Act.

NPOVolunteerOrganization ManagementGovernance

Transparent Officer Selection & Task Assignment for NPOs/Volunteer Organizations - Building Trust Through Governance

How to conduct officer selection, duty assignment, and role distribution transparently in NPOs and volunteer organizations. A practical guide for governance strengthening and trust building.

onlineofflinehybridcomparison

Offline vs Online Lottery [Complete Comparison] Hybrid Event Strategies

Comprehensive comparison of in-person and online lottery methods. Learn optimal strategies for hybrid events with detailed pros and cons analysis.

schooleducationrole assignmentgroup division

Fair Decision-Making Methods for Schools and Educational Settings [Complete Guide to Role Assignment, Group Division, and Order Determination]

A comprehensive guide on how to fairly assign roles, divide groups, and determine order in schools and educational settings. Achieve better classroom management through transparent decision-making processes that students can accept.

Seasonal EventsAnnual EventsEvent IdeasLottery

Seasonal Lottery Ideas Collection [Spring, Summer, Fall, Winter - Year-Round Event Lottery Plans]

Introducing seasonal lottery ideas for annual events such as entrance ceremonies, sports festivals, Christmas, and cherry blossom viewing. A complete guide to lottery projects that liven up your events.

Team BuildingTrainingIce BreakerGames

10 Ice-Breaking Lottery Games Perfect for Team Building

10 ice-breaking games for team building suitable for training sessions, meetings, and social gatherings. Practical methods to enhance teamwork through fun lottery activities.

Use CasesEventsCompany PartyLottery

Exciting Year-End Party Prize Draw: A New Approach with Amida-san

Discover a transparent and participatory lottery method to make your company year-end parties more engaging. With Amida-san, everyone can trust the fairness of the draw.

Role AssignmentOrganizer SelectionUse Cases

How to Fairly Assign Roles and Responsibilities【Digital Amidakuji Guide】

Learn how to fairly assign roles like party organizers, duties, and responsibilities. Using digital amidakuji provides transparency and satisfaction for everyone involved.

FreeOnline AmidakujiHow to Use

Free Online Amidakuji - No Registration Required, Mobile-Friendly

Create and share amidakuji online for free with Amida-san. No registration required, mobile-friendly, supports large groups. Perfect for event lotteries, role assignments, and team divisions.

Online EventsLottery ToolRemote

How to Run Successful Online Event Lotteries【Large Group Support】

Online event lottery tool for the remote work era. Fair prize distribution and winner selection for large groups with Zoom/Teams integration. Transparent lottery system that enhances your events.

AmidakujiGhost LegLottery Method

What is Amidakuji? Understanding Japan's Fair Decision-Making Method

A comprehensive guide to amidakuji (ghost leg lottery) - from its basic structure and history to modern applications. Learn why this simple paper-and-pen method has been trusted for fair selection across Asia for generations.

AnnouncementFeatures

Welcome to Amida-san - Fair and Transparent Lottery Drawing

Amida-san is a web service for creating and sharing online Amida lottery. Perfect for event lotteries, team division, role assignment, and more.