I'd like to share some informaiton about the language in Quickbooks Online (QBO).
The default language in QBO is English for all countries except for the following (available in Account and Settings):
In the meantime, as a workaround, you can consider using the Google Translate plug-in in Google Chrome. In Google Translate, you can select from multiple languages to translate the QuickBooks Online interface.
Follow these steps to install the Google Translate plug-in:
If you have any other questions, please let me know. I'll be happy to lend a hand.
As of the moment, the Japanese Language interface is not yet available in QuickBooks. And we're unable to provide the exact turnaround time as to when it will be included in any of the coming updates.
With this, let's consider letting our product developers know about your request by following the steps below:
Additionally, I've also included this reference for a compilation of articles you can use while working with us: Account Management for QuickBooks Online.
If there's anything else that I can help you with, please let me know in the comments below. I'll be here to lend a hand.
Utilize an additional app as a workaround to integrate with your QBO for the time being. e.g utilize a project management/CRM app with the time tracker feature for your internal team, create an estimate/invoice for your local customers.
Project Management app with Japanese characters
Invoice with the Chinese characters