Problem Statement
The Microsoft Calculator currently lacks support for the Tsubo (坪), a traditional Japanese unit of area and floorspace that is also widely used in Taiwan. The absence of this unit in the Calculator app creates an inconvenience for users in these regions who commonly use Tsubo in real estate and construction contexts. By integrating Tsubo, the app can cater to a broader audience and address a specific regional need.

Evidence or User Insights
According to Wikipedia article on 坪, the Tsubo is a unit born in Japan but was also used in Korea and Taiwan during Japanese rule. In Taiwan, despite the government's declaration in 1945 to switch to square meters, Tsubo is still widely used in civilian contexts. This historical and ongoing usage in these regions provides a strong case for its inclusion in the Calculator app to meet user expectations and requirements.

Proposal
The proposal is to integrate Tsubo as a unit of measurement for area and floorspace in the Microsoft Calculator app. This integration will enable users in Japan and Taiwan, and those familiar with the unit, to perform conversions directly within the app, enhancing its utility and relevance in these markets.

Goals
User can convert between Tsubo and other units of area (such as square meters, square feet, etc.) within the Calculator app.

Non-Goals

1. Overhaul of the existing measurement conversion system in the app.
2. Integration of every traditional unit of measurement from every culture, as the focus is specifically on Tsubo due to its significant usage in specific regions.

Low-Fidelity Concept
As the equivalent unit conversion has been implemented for Korean regions by #382, and the translations for Taiwan

bool usePyeong = m_currentRegionCode == L"JP" || m_currentRegionCode == L"TW" || m_currentRegionCode == L"KP" || m_currentRegionCode == L"KR";

A dev build run in TW region would look like this:

Requested Assignment
If possible, I would like to implement this.