Open “Account Registration Page“, and click the top right button.
Click Start button of LINE official account like below.
Choose your sign-up method. If you want to link it to your personal LINE account, please choose the option above. If you want to link it to your company email, please choose the option below. *The sign-up method below has limited functionality, so I recommend the option above unless you have a specific reason. 
Click login button.
Set up your account information, including industry, and finally, press the confirmation button.
Click Completed button.
You’ve finnished making LINE official account.
Scroll down, and you will find “Request Account Verification” button. I will describe about that shortly. Therefore, if you’re interested in it, please read the passages below.
In LINE Official Accounts, there are two types: “Verified Accounts” and “Unverified Accounts.” To become a Verified Account, you need to pass LINE Yahoo’s review process. The benefits of becoming a Verified Account include:
- Being displayed in friend search results.
- Access to download store posters.
These are some of the advantages of having a Verified Account. For more details: What’s the difference between Verified or unverified LINE Official Account
LINE Official Accounts cannot be established for certain industries or services.
Industries or services falling into the following categories are unable to open LINE Official Accounts like below.
Dating [Cases Where You Can’t Open] Companies organizing matchmaking events, companion pubs, dating parties, live chat, online matchmaking services
Adult Content [Cases Where You Can’t Open] Adult entertainment venues, men’s esthetic salons, adult shops, strip theaters, ear-cleaning and thigh-pillow services, JK businesses
Pyramid Schemes [Cases Where You Can’t Open] Ponzi schemes, multi-level marketing (MLM)
Questionable Sales Methods [Cases Where You Can’t Open] Selling products exploiting human anxiety, unhappiness, or gambling tendencies Selling products using illegal sales methods Selling products with insufficient scientific basis
source:https://www.lycbiz.com/jp/column/line-official-account/technique/20190829/