8 Recommended AI Keyword Selection Tools Compared

This article is a re-edited version for note of content originally published on the official blog operated by Knowledge Holdings Inc.

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[2026 Latest] 8 Recommended AI Keyword Selection Tools Compared

When creating SEO articles,

“Which keywords should I target?”
“Should I just choose the ones with high search volume?”
“Can I do keyword selection with just ChatGPT?”

do you ever wonder?

In 2026, simply looking for “words with high search volume” is becoming insufficient for keyword selection. This is because, in addition to Google Search, there are more instances where AI directly answers user questions, such as through AI Overviews and ChatGPT.

What will become important from now on is designing not just “what is being searched,” but also “what that person wants to know.” In other words, you need to broaden your perspective from the keywords themselves to search intent.

In this article, we will introduce the mindset for AI-powered keyword selection and 8 recommended tools categorized by their purpose.

1. Keyword selection in 2026: From “words” to “search intent”

In traditional SEO,

Search volume
Competitiveness
Search ranking

were commonly checked to decide on target keywords.

Of course, these are still important. However, with the spread of AI search, there is an increasing need to consider “what questions users are asking,” “what concerns lie behind those questions,” and “whether there is information that AI can refer to when generating answers.”

That is why, alongside SEO, people are becoming aware of GEO (Generative Engine Optimization). This is a concept that aims not only to rank high in search results but also to increase the likelihood that your company’s information will be referenced or cited in generative AI answers.

That is precisely why keyword selection requires a perspective of “I’ll write it because it has high search volume” rather than “What can our company uniquely answer regarding the questions that lie beyond this search?”

2. What can AI keyword selection tools do?

By utilizing AI and SEO tools, you can streamline the keyword research that was previously done manually. For example:

✓ Extracting a large number of related keywords
✓ Collecting suggestions
✓ Checking search volume
✓ Analyzing competitiveness and difficulty
✓ Categorizing by search intent
✓ Creating article structures
✓ Generating drafts for article text

However, it does not mean you should leave everything to AI. It is important to use specialized tools to check data such as search volume and competition.

AI for “divergence and organization,” specialized tools for “checking metrics,” and humans for “strategic decision-making”—it becomes easier to use when you divide roles like this.

3. 8 Recommended AI Keyword Research Tools

The most suitable tool depends on your objectives.

1. Google Keyword Planner

This is an official Google tool that is easy to use when you want to check basic search demand data. You can check related keywords and estimates of search volume. Since it is free to start, it serves as an entry point for people who want to try keyword research for the first time.

On the other hand, since search volume may be displayed as a range depending on ad usage, you should consider using it in combination with other tools for detailed analysis.

2. Rakko Keywords

This is a domestic tool that is convenient for finding Japanese suggestions and related keywords. It is easy to use when you want to expand from a single keyword to see ‘what other words are being searched for,’ and it is also suitable for beginners. It also has features that support AI-driven title, heading, and article creation.

3. ConoHa Pencil

This is an AI writing tool for people who want to go beyond keyword research and proceed to Keyword → Outline → Body Text Creation. It is an option for bloggers and content managers who want to streamline the SEO article production process.

4. Ubersuggest

This is a tool that allows you to check search volume, SEO difficulty, and related keywords relatively simply. It is designed to be easy for individuals and small businesses to use when they want to check basic SEO data first, rather than performing advanced analysis.

5. Ahrefs

This is a representative tool that is a candidate if you are going to analyze SEO in earnest. Beyond just keywords, you can analyze

competitor sites,
backlinks,
top-ranking pages,
and keyword difficulty.

It is suitable for cases where you want to analyze deeply, not just ‘should I target this keyword?’ but also ‘why is the competitor ranking high?’

6. Semrush

This is an SEO platform that can handle a wide range of tasks, including keyword research, competitor analysis, search intent, and content creation. Rather than one-off article production, it is suitable for companies and managers who want to manage the SEO strategy of their entire owned media. Features for analyzing visibility in AI search are also being rolled out.

7. Keywordmap

This is a tool for companies that want to analyze Japanese SEO and content marketing in earnest. It can be used for competitor research, search intent analysis, content design, and even for bringing SEO in-house. It is an option for companies operating owned media, SEO managers, and agencies, rather than for individuals.

8. NoimosAI

These are options for when you want to streamline not just keyword research, but also SEO, GEO, competitor analysis, and content creation across the board using AI. These tools are worth considering if you want to leverage AI not just for ‘finding keywords,’ but for the entire process from research to content creation and management.

4. Ultimately, which tool should you choose?

The important thing is not to choose the ‘most feature-rich tool.’ You should choose based on what you want to achieve.

If you want to start for free

Google Keyword Planner + Rakko Keywords
You can start by expanding related keywords and checking search demand.

For beginners and personal blogs

Rakko Keywords / ConoHa Pencil
These are easy to use in Japanese and make it simple to progress from keyword research to article creation.

If you want to perform serious SEO analysis

Semrush / Ahrefs
You can analyze competitors, difficulty, top-ranking pages, and more.

For corporate owned media

Semrush / Keywordmap
These are suitable if you want to consider strategy design and competitor analysis for the entire media, rather than just single articles.

If you want to streamline article creation with AI

NoimosAI / ConoHa Pencil
These are candidates if you want to utilize AI for outlining and article creation after keyword research.

5. ChatGPT and Claude can also be used for keyword selection

Beyond dedicated SEO tools, you can also use ChatGPT and Claude for keyword selection. They are particularly good at:

✓ Brainstorming related keywords ✓ Discovering long-tail keywords ✓ Categorizing search intent ✓ Organizing personas ✓ Creating article outlines

For example, starting from the keyword ‘MEO measures,’ you can use them to expand on the questions users have, such as:

‘MEO measures effectiveness’, ‘MEO measures cost’, ‘MEO measures DIY’, ‘MEO measures reviews’, ‘MEO measures how many months’

However, be careful: do not rely solely on AI to judge metrics like search volume. It is recommended to use AI to generate candidates and then verify the actual data using Keyword Planner or SEO tools.

6. 5 Steps for Keyword Selection using AI and Tools

The actual keyword selection process is easier to organize if you proceed as follows.

STEP 1 | Decide who you are reaching

First, clarify whose problems you are solving and what those problems are. If you choose keywords based solely on search volume while this remains vague, you may end up with articles that attract traffic but do not lead to inquiries.

STEP 2 | Expand keywords with AI

Use ChatGPT or Claude to identify related keywords, questions, and long-tail terms from your main theme. At this stage, do not narrow them down too much; generate a wide range of candidates.

STEP 3 | Verify data with specialized tools

Check search volume and competitiveness using specialized tools. The flow is to generate candidates with AI and verify them with tools.

STEP 4 | Group by search intent

Organize candidate keywords by user purpose, such as:

Want to know
Want to compare
Want to do
Want to purchase/request

Grouping keywords with similar search intent also makes it easier to prevent content duplication.

STEP 5 | Choose themes where your company can win

Finally, determine priorities by looking not just at search volume, but at Search Demand × Competitiveness × Search Intent × Your Company’s Expertise. This is the part where humans, not AI, should make strategic decisions.

7. In the GEO era, also consider ‘questions that AI can easily answer’

In AI search, users do not necessarily search with short words. For example, instead of ‘SEO tool’, they might input specific questions like:

‘What are some free SEO keyword tools for beginners?’
‘What are some keyword analysis tools that are strong in Japanese?’
‘What are some tools that can be used for both SEO and AI search?’

That is why it will be important in the future to design not just single keywords, but also what kind of questions users will ask about that theme. And for the articles themselves, the key is to organize:

Clear answers to questions
Comparison tables
Concrete steps
FAQs
Primary information/original data
Reliable sources

and so on.

Summary | More important than tools are ‘Search Intent × Primary Information’

AI keyword selection tools are extremely convenient. However, simply introducing a tool does not determine the success of your SEO or GEO efforts.

What is important is the following process:

Expand candidates with AI
↓
Verify data with specialized tools
↓
Organize search intent
↓
Select themes your company should address
↓
Add primary information and expertise to create articles

Let AI handle the research and organization, while humans focus on ‘Who are we delivering to, and what can only we say?’. Keyword selection in 2026 is shifting from the task of simply finding ‘searched words’ to designing information with an eye toward both user search intent and AI responses.

Tools are merely a means to an end. In future SEO and GEO, deeply understanding search intent and layering it with your company’s unique primary information will lead to content differentiation.

The full version of this article, implementation case studies, and AXiY materials are all available on our official website.

▼ [Full Official Blog Post] 8 Recommended AI Keyword Selection Tools Compared: How to Choose ‘Winning Words’ in the Era of SEO and GEO
[2026 Latest] 8 Recommended AI Keyword Selection Tools Compared

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Author Profile

Aya Kurino
Public Relations at Knowledge Holdings / Representative of Knowledge Marketing.
Specializing in AI Search (LLMO) x SNS x MEO, responsible for DX support for over 400 companies.