//
OpenES (Open Entry Sheet) is a Rikunabi service that lets you write one entry sheet and submit it to multiple companies. Unlike a paper résumé, the photo is submitted as a data file on the Web — so if you get the size and format right once, the same photo works for every company you apply to.
This guide covers the OpenES photo specifications and how to prepare a compliant file from your smartphone.
The profile photo on OpenES is an ID photo with the same 4:3 aspect ratio (height 4 : width 3) used on paper résumés. Because it is submitted as data, the pixel size and file format matter too.
| Item | Guideline |
|---|---|
| Aspect ratio | 4:3 (height 4 × width 3) |
| Pixel size | Around 600 (H) × 450 (W) pixels |
| File format | JPG (JPEG) or PNG |
| File size | Under 2MB |
| Background | Plain, light color (white, light gray, light blue) |
The aspect ratio, format, and file-size guidelines follow Rikunabi NEXT's guide to digitizing ID photos.
Confirm the exact limits on the upload screen
The OpenES upload screen may state the accepted formats and maximum file size. Always check what the screen displays before you submit.
OpenES has more than one field for images, but only the profile-field ID photo needs to meet ID-photo specifications.
Putting your ID photo in the activity field weakens your self-PR. Keep the ID photo in the profile field.
You don't need special equipment — the shooting environment is what decides the result.
The rear camera has higher resolution and avoids the distortion selfies introduce. Ask a friend or family member; if shooting alone, place the phone on a stable surface and use the timer.
Morning to early afternoon, with daylight from a window hitting your face from the front, is ideal. Don't stand with your back to the window, or your face will come out dark.
Face straight ahead, mouth gently closed, shoulders relaxed. For expression, clothing, and hairstyle tips suited to job-hunting photos, see our job-hunting photo manual.
A photobooth print can't be submitted as-is
A printed photobooth photo is paper, so it can't be uploaded to OpenES directly — it needs to be digitized (scanned and resized) first. Preparing the photo as data from the start saves that step.
A raw smartphone photo is not yet 4:3, and the background is not yet plain. Two things need to happen before you submit:
Doing this by hand in an editing app is difficult if you're not used to it.
mynaphoto.jp handles the data preparation automatically
Upload your phone photo to mynaphoto.jp and our AI removes the background, adjusts the size, and checks the specifications — then you download a ready-to-submit file. Beyond the OpenES (CV) format, the same upload covers 19 document types including My Number Card and passport, so one photo serves more than job hunting.
The ID-photo specs (4:3, plain, front-facing) are the same for OpenES and a paper résumé. The difference is how you submit it.
| Item | OpenES | Paper résumé |
|---|---|---|
| Submission | Upload data on the Web | Print and glue onto paper |
| Photo form | JPG / PNG data | Printed photo |
| Reuse | Submit to many companies as-is | Re-attach for each application |
For submitting photo data to Web résumés on Rikunabi, Mynavi, or doda, see our Web résumé photo submission guide.
Prepare your OpenES photo data now
Just shoot with your phone and upload. AI removes the background, adjusts the size, and checks the specs. Natural skin retouching; facial features never altered.
Create Your PhotoNote
This article is based on general specifications and guidelines current as of June 2026. The official OpenES photo requirements may change. Always verify the latest guidance on Rikunabi OpenES before submitting.
A 4:3 aspect ratio (height 4 : width 3) is standard. As data, around 600×450 pixels is recommended, in JPG or PNG format, under 2MB. Confirm the exact limits on the OpenES upload screen.
Yes. If it meets the specifications, a smartphone photo file is accepted. Shoot with the rear camera in bright, natural light for the best result.
The photo specs (4:3, plain background, front-facing) are the same. The difference is that OpenES is submitted as data on the Web, not glued onto paper.
No. The profile field uses an ID photo, but the self-PR and student-activity fields use candid photos that convey your activities — these are not ID photos.
A plain, light color — white, light gray, or light blue. Shoot against a wall so no objects appear behind you.