fnotes

You can place the inquiry form to the articles and fixed page, the widget. 
Just continue to add form items with a shortcode, you can create a form.
<h3>Arbitrary section</h3>

firstform

Easy create a inquiry form, Check the inquiry.

probonodesign

Probono Form is a contact form plugin designed and developed specifically for Japanese websites. Create a fully functional contact form with just a few clicks.
<h4>Why Choose Probono Form</h4>
<ul>
<li>Made in Japan – Developed by Japanese developers who understand Japanese web forms</li>
<li>32 Free Features – Comprehensive free feature set for contact forms</li>
<li>Japanese Optimized – Auto-address lookup, furigana generation, honorific support</li>
<li>Lightweight & Fast – Minimal code for optimal performance</li>
</ul>
<h4>Free Features (32 features)</h4>
Form Basics (8 features) 
Unlimited form creation, form duplication, form deletion (single/bulk), form name editing, 12 field types (pf1-pf12), required field settings, real-time preview, shortcode output
Confirmation Screen (5 features) 
Confirmation screen ON/OFF, title customization, message customization, button text editing, success/error messages
Email Functions (6 features) 
Admin notification email, subject customization, CC settings, BCC settings, auto-reply email, reply template selection
Style Settings (5 features) 
Form border ON/OFF, 5 color themes, button shape options, button fill options, font size options
Japanese Features (3 features) 
Postal code to address auto-fill (zipcloud API), furigana auto-generation, honorific auto-append
Spam Protection (2 features) 
Honeypot field, submission time check
Other (3 features) 
Responsive design, loading spinner, double-submit prevention
<h4>Pro Version</h4>
For advanced features including AI-powered form assistance, advanced Japanese features, and more, a separate Pro plugin is available at <a href="https://form.prbn.org" rel="nofollow ugc">https://form.prbn.org</a>
<h3>External services</h3>
This plugin connects to the zipcloud API to retrieve address information from Japanese postal codes. It is used to automatically fill in the address field when a user enters a postal code in the form.
The postal code entered by the user is sent to the zipcloud API only when the postal code field is used and the user inputs a value.
This service is provided by IBS Co., Ltd.: 
– Service URL: https://zipcloud.ibsnet.co.jp 
– Terms of service: https://zipcloud.ibsnet.co.jp/rule/api 
– Privacy policy: https://zipcloud.ibsnet.co.jp/policy

Probono Form Basic

No coding required - just click buttons and start using. A Made in Japan form plugin for Japanese websites.

firstform vs Probono Form Basic