I just signed up 30 min ago but missed/ or didn't see any option to change country to US (from JP). The customer support keeps leaving the chat without a word.. any help?

You need to signup for QBO US version, correct? You can try this link

https://quickbooks.intuit.com/#

Don't forget to cancel your QBO Global version for Japan.

Welcome to the Community forum, happyopufinance-.

I'm here to get the help you need so you can use the QuickBooks Online (QBO) account for the US region.

If you signed up for the QBO JP region and wanted to use the US region. You'll have to cancel your QBO JP account first to avoid charges in the future. Here's how:

1. Go to the Gear icon in the upper right corner.
2. Choose Subscriptions and billing.
3. In the QuickBooks section, select Cancel subscription or Cancel online. 
4. Follow the on-screen steps.

If you need more information on cancelling your subscription, you can read this article: Cancel your QuickBooks Online subscription or trial.

To subscribe to the US region for QBO, you can use this link: https://quickbooks.intuit.com/pricing/.

To help you get started with the QBO US region, you can visit this site to learn how to manage your account: Get started with QuickBooks .

I am always here to help you with any further inquiries about managing your QBO account. Feel free to ask me anything.