Letter of Reason for Invitation at a glance
What it is: Letter of Reason for Invitation, addressed To the (Ambassador/Consul-General) of Japan, for the purpose of inviting the visa applicant(s).
Where and when to file: After To:, fill in the (Ambassador/Consul-General) of Japan in.
A filled-in Letter of Reason for Invitation example: one person invites one visa applicant

How to fill out Letter of Reason for Invitation, box by box
Inviting Person

Under Inviting Person, enter the Address, Full name, Telephone number, Extension and FAX number.
When an inviting person and a guarantor are the same, you may skip this section by writing “omitted”.
When a company/organization is extending an invitation, fill out the name of the company/organization as well as your title and affix, and put the registered seal of the representative, or non-registered seal of the company or the sub-organ (a personal seal is unacceptable). If it is difficult to put the seal, a person in a position of authority at the company/organization may put his/her signature. Foreign nationals who do not have a seal may put his/her signature here.
Company or organization contact person
Visa Applicant

Under Visa Applicant, enter Nationality, Occupation, Full name (in Latin alphabet) and Date of birth, with the Age.
Make sure the name is written in the Latin alphabet as it appears on his/her passport.
When there are two or more applicants, fill in the representative's status in Visa Applicant, and attach a list of all applicants.
Purpose, background and relationship

The purpose of inviting the Visa Applicant person(s) is as follows: (1) Purpose of invitation.
If the space is insufficient, use a separate sheet of paper to give a full explanation.
(2) Background to invitation: explain the background to this invitation in detail.
(3) Relationship with visa applicant(s).
Sources
[1] Letter of Reason for Invitation (the Official source link on this page).


