What LINE's terms say
LINE's terms of service and privacy policy have 32 rated points: 3 serious, 16 bad, 7 worth knowing and 6 good. 24 apply whenever you use the site, signed in or not; 8 only once you have an account.
Whenever you use LINE
Serious 1
Sensitive data is collected and shared to target advertising
In some countries, sensitive data is collected and shared to target advertising
Applies to Japan, Taiwan, Thailand, Indonesia. Personal messages can (and often does) include sensitive information.
Where it says this ↗
Bad 14
Your data may be processed and stored anywhere in the world
Where it says this ↗Information is gathered about you through third parties
Where it says this ↗Third-party cookies are used for statistics
Where it says this ↗Extra data may be collected about you through promotions
Where it says this ↗Your personal information is used for many different purposes
The list of purposes continues following this quote, but I didn't want to highlight all of it.
Where it says this ↗This service shares your personal data with third parties that are not essential to its operation
Where it says this ↗You are tracked via web beacons, tracking pixels, browser fingerprinting, and/or device fingerprinting
You are tracked via web beacons, tracking pixels, browser fingerprinting and device fingerprinting
Also: "We may use cookies and similar web tracking technologies (web beacon, pixel etc.) "
Where it says this ↗A secure, anonymized record of your data may be kept for analytical purposes after the data retention period ends
The service may keep a secure, anonymized record of your data for analytical purposes even after the data retention period
Where it says this ↗Your personal data may be sold or otherwise transferred as part of a bankruptcy proceeding or other type of financial transaction
Where it says this ↗Your data is processed and stored in a country that is less friendly to user privacy protection
Simply by reading the Privacy Policy it is clear that Japan as weak privacy laws: "As of January 23, 2019, the European Commission has determined that Japan has secured sufficient protection standards regarding Personal Data"
Where it says this ↗Location data may be collected, used and/or shared
In some countries, this service may collect, use, and share location data
Applies to: Japan, Taiwan, Thailand, Indonesia
Where it says this ↗Your profile is combined across various products
In some countries, your profile is combined across various products
Applies to: Japan, Taiwan, Thailand, Indonesia
Where it says this ↗You may be tracked on other websites
This service tracks you on other websites and apps
Where it says this ↗
Worth knowing 5
The service can stop being provided at any time
They may stop providing the service at any time
Where it says this ↗Third parties are involved in operating the service
Where it says this ↗This service gives your personal data to third parties involved in its operation
Where it says this ↗You should revisit the terms periodically, although in case of material changes, the service will notify
You should revisit the privacy policy periodically, although in case of material changes, the service will notify
Where it says this ↗The terms may be changed at any time, but you will receive notification of the changes
The service may change its terms at any time, but the user will receive notification of the changes.
Where it says this ↗
Good 4
You can limit how your information is used by third parties and the service
You can limit how your information is used by third-parties and the service
Where it says this ↗Information is provided about security practices
Where it says this ↗The service claims that third parties it shares your personal information with are bound by confidentiality obligations
Third parties used by the service are bound by confidentiality obligations
Where it says this ↗You can request access, correction and/or deletion of your data
Where it says this ↗
If you have a LINE account
Serious 2
Private messages can be read
Where it says this ↗Your identity is used in ads that are shown to other users
In some countries, your identity is used in ads that are shown to other users
Applies to: Japan, Taiwan, Thailand, Indonesia
Where it says this ↗
Bad 2
You must provide your identifiable information
Where it says this ↗Your provided identifiable information is actively checked by the service
Where it says this ↗
Worth knowing 2
You must create an account to use this service
Where it says this ↗Your account can be suspended for several reasons
The service can suspend your account for several reasons
Where it says this ↗
Good 2
You have the right to leave this service at any time
Where it says this ↗You can retrieve an archive of your data
Where it says this ↗
The documents
Ratings by ToS;DR volunteers; they can lag behind the current terms. Not legal advice.