Calculate Japan Post Postage and Yu-Pack Fees
Japan Post fees depend on mail dimensions, weight, service options, and parcel origin. This skill calculates supported charges from dated tables and identifies missing information.
Copy this request to your Agent. It includes the canonical Skill page and manifest.
Review the Skillstore skill "yubin-fee" from https://skillstore.io/skills/tahodev-yubin-fee.md and its manifest at https://skillstore.io/api/skills/tahodev-yubin-fee/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.Your Agent should still show its plan and request any confirmation required by the security policy.
Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.
Using "yubin-fee". A domestic envelope measures 20 by 10 by 0.5 cm and weighs 30 g. What postage is required?
Expected outcome:
Using "yubin-fee". Send a 100 g domestic envelope measuring 30 by 20 by 2 cm by express and simplified registered mail.
Expected outcome:
Using "yubin-fee". Send a 5 kg parcel measuring 30 by 25 by 20 cm from Tokyo to Osaka, without discounts.
Expected outcome:
All ten static findings are false positives in this readable, documentation-only skill. URLs cite official Japan Post sources; backticks mark metadata, and the parent-directory path links documentation rather than performing filesystem operations. No evidence found of prompt injection, secret access, data exfiltration, or executable commands.
Share the versioned assessment report, neutral badge, embed card, and citations. Skillstore reports evidence without deciding whether this Skill is safe.
https://skillstore.io/skills/tahodev-yubin-fee/audits/1?utm_source=security_passport&utm_medium=share&utm_campaign=versioned_report[](https://skillstore.io/skills/tahodev-yubin-fee?utm_source=security_passport_badge)<a href="https://skillstore.io/skills/tahodev-yubin-fee?utm_source=security_passport_badge"><img src="https://skillstore.io/badges/skills/tahodev-yubin-fee/security.svg" alt="Skillstore security assessment" loading="lazy"></a><iframe src="https://skillstore.io/embed/skills/tahodev-yubin-fee.html" title="Skillstore Security Assessment" sandbox="allow-popups allow-popups-to-escape-sandbox" loading="lazy" referrerpolicy="no-referrer" width="420" height="180"></iframe>tahodev. (2026). yubin-fee security audit report (audit version 1) [Author version unspecified]. Skillstore. https://skillstore.io/skills/tahodev-yubin-fee/audits/1@techreport{tahodev-tahodev-yubin-fee-2026,
author = {tahodev},
title = {yubin-fee security audit report (audit version 1)},
institution = {Skillstore},
year = {2026},
number = {1},
url = {https://skillstore.io/skills/tahodev-yubin-fee/audits/1},
note = {Author version unspecified}
}cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "yubin-fee security audit report (audit version 1)"
version: "unspecified"
type: report
authors:
- name: "tahodev"
date-released: "2026-10-13"
url: "https://skillstore.io/skills/tahodev-yubin-fee/audits/1"
identifiers:
- type: other
value: "skillstore:tahodev-yubin-fee:audit:1"
description: "Skillstore immutable audit report identifier"
Check an envelope against size and weight limits, then calculate the required postage and a suitable stamp combination.
Estimate Tokyo-origin Yu-Pack costs from package measurements and destination regions before quoting shipping to customers.
Compare supported registered-mail and delivery-record charges, including compatible express options, for outgoing documents.
My domestic envelope is 20 cm by 10 cm by 0.5 cm and weighs 30 g. Calculate postage and state the rate date.
My domestic envelope measures 30 by 20 by 2 cm and weighs 100 g. Compare express, simplified registered, and delivery-record charges, including valid combinations.
My parcel ships from Tokyo to Osaka, measures 30 by 25 by 20 cm, and weighs 5 kg. Calculate undiscounted Yu-Pack postage.
For [mail items with dimensions, weights, destinations, and options], calculate individual charges, stamp combinations, and the batch total. Flag missing details and unsupported services.
Author
tahodevLicense
MIT
Skillstore revision
r1
Version notice
The author did not declare a version.
Repository
https://github.com/tahodev/kurashi-skill/tree/09cb7f9eac85f0c85633cce08328a1a57854a94f/yubin-feeRef
7f17813fb6af1acc7d8fd3fb5f05480f5be52783
Maintenance freshness
10/13/2026
Usage
0 downloads · 0 views
File structure
📄 SKILL.md
Find Taiwan Hospitals and Clinics
Finding reliable contact details for Taiwan medical providers can require searching multiple sources. This skill guides searches using the public NHI-contracted provider directory.
Find Available YouBike Bicycles and Return Spaces
Finding a bicycle or an empty return space requires current station information. This skill guides public-feed queries for YouBike availability across Taiwan.
Estimate Japanese Monthly Withholding Tax
Japanese salary withholding varies with payment year, eligible dependents, and pay after social insurance. This skill calculates local formula-based estimates and explains differences from printed tax tables.
Convert Japanese Era and Gregorian Dates
Japanese era dates can be confusing when an era changes during a calendar year. This skill applies daily boundaries and arithmetic to convert dates offline.
Check Taiwan Weather and Disaster Alerts
Taiwan weather checks can require API keys or separate searches for forecasts and disaster alerts. This skill guides keyless Open-Meteo queries and NCDR alert lookups with location and timestamp checks.
Check Taiwan Water Outage Notices
Water interruptions can leave residents uncertain about affected areas and expected restoration times. This skill guides assistants through official public notices and location-based summaries.
Track Long Tasks With a Portable State Ledger
by glenskii
Long technical tasks lose decisions, evidence, and next actions across sessions. This skill maintains a concise Markdown state file with reviewed local evidence references.
Verify AI Deliverables with Evidence
by jadeyingwah
AI work can appear complete before the result is opened, tested, or checked against the request. This skill adds staged planning, real-environment verification, and honest completion levels.
Choose the Right AI Tool for Every Task
by 0xDarkMatter
Choosing between many skills and agents can delay technical work. This skill maps each task to focused tools using concise catalogs and selection rules.
Optimize Prompts With Proven Patterns
by wshobson
LLM prompts can fail through unclear instructions, weak examples, or missing evaluation. This skill provides templates, reasoning patterns, and optimization workflows for Claude, Codex, and Claude Code.
Organize GitHub Issues With Labels
by C0ntr0lledCha0s
Large repositories can lose track of issue priority, scope, and release status. This skill designs label taxonomies, applies labels in bulk, and manages milestones with GitHub CLI workflows.
Create Reflective Tarot Readings
by gokimedia
Tarot requests can become inconsistent or overconfident without a structured source. This skill uses a bundled 78-card dataset and defined spreads for reflective interpretations.