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TokyoDev Developer Survey 2025

技術

⚙️ プログラミング言語

Python took first place for the most popular language.

While programming language choice correlated with total compensation, this seems largely explained by differences in experience. Swift users had the highest median pay at ¥13 million and a median of 10.5 years of experience, while Dart users had the lowest pay at ¥4.5 million and the least experience at 5 years.

普段の仕事で使うプログラミング言語は？
Multiple
0%
20%
40%
60%
80%
100%
1

Python

+1
409
2

JavaScript

-1
399
3

TypeScript

373
4

HTML/CSS

333
5

SQL

312
6

Bash/Shell

252
7

Java

147
8

Go

119
9

Ruby

108
10

C++

+1
104
0%
20%
40%
60%
80%
100%
回答数に占める割合（%）
878
87%
10

🌐 ウェブフレームワーク

React remained the most popular web framework.

普段の仕事で使うウェブフレームワークは？
Multiple
0%
20%
40%
60%
80%
100%
1

React

306
2

Next.js

151
3

Rails

+1
101
4

FastAPI

+2
99
5

Spring

96
6

Vue.js

-3
89
7

Django

78
8

Express

59
9

Flask

+2
54
10

jQuery

-1
53
0%
20%
40%
60%
80%
100%
回答数に占める割合（%）

Unlike last year's survey, this year the question above let respondents select “None of the above” as an option instead of having to skip the question altogether.

The year-over-year decline shown here is almost certainly due to this increase in total question participation, and not to any real-world trend.

796
79%
10

📖 他のフレームワークとライブラリ

普段の仕事で使う他のフレームワークやライブラリは？
Multiple
0%
20%
40%
60%
80%
100%
1

NumPy

141
2

Pandas

138
3

Torch/PyTorch

98
4

Spring

70
5

scikit-learn

+3
67
6

OpenCV

+1
59
7

TensorFlow

+2
57
8

.NET

-2
55
9

React Native

+2
52
10

Apache Kafka

-5
51
0%
20%
40%
60%
80%
100%
回答数に占める割合（%）

Unlike last year's survey, this year the question above let respondents select “None of the above” as an option instead of having to skip the question altogether.

The year-over-year decline shown here is almost certainly due to this increase in total question participation, and not to any real-world trend.

644
64%
10

☁️ クラウドプラットフォーム

AWS remained the most popular cloud platform.

普段の仕事で使うクラウドプラットフォームは？
Multiple
0%
20%
40%
60%
80%
100%
1

AWS

541
2

Google Cloud

257
3

Azure

112
4

Cloudflare

+1
71
5

Firebase

-1
70
6

Vercel

47
7

Heroku

18
8

Digital Ocean

11
9

🚫 該当なし

97
10

Other Answers

51
0%
20%
40%
60%
80%
100%
回答数に占める割合（%）

Unlike last year's survey, this year the question above let respondents select “None of the above” as an option instead of having to skip the question altogether.

The year-over-year decline shown here is almost certainly due to this increase in total question participation, and not to any real-world trend.

821
81%
10

🛠️ ソフトウェアエンジニアリングの実践

Greater use of English correlated with higher adoption of software engineering best practices, even among those working at Japanese-headquartered companies.

For example, 70% of respondents who used English frequently or always said their employer used continuous integration, compared to 45% who rarely or never did. Similarly, 63% of frequent English users worked at organizations with monitoring and logging, compared to 34% of infrequent users. For automated testing, the figures were 59% versus 28%, and for infrastructure as code, 49% versus 25%. The only practice more common among infrequent English users was waterfall development, used by 30% compared to 15% of frequent users.

以下のうち、あなたの職場でソフトウェア開発において実践しているものを教えてください。
Multiple
0%
20%
40%
60%
80%
100%
1

バージョン管理

685
2

コードレビュー

655
3

継続的インテグレーション

571
4

アジャイル開発

539
5

モニタリングとロギング

514
6

継続的デプロイメント／デリバリー

511
7

Infrastructure as Code (IaC)

372
8

非難なしのポストモーテム

227
9

ペアプログラミング

180
10

ウォーターフォール開発

129
11

🚫 該当なし

33
12

Other Answers

10
0%
20%
40%
60%
80%
100%
回答数に占める割合（%）
855
85%
10

🏞️ ソーシャルメディア

Among respondents with native or bilingual Japanese ability, the most popular social media platform was Twitter/X, used by 57%, compared to 25% of native or bilingual English speakers. Conversely, Reddit was most popular among native English speakers, used by 55%, compared to 34% of native Japanese speakers.

While most respondents found out about the survey through other means, among social media channels, Reddit and LinkedIn were the most common sources.

定期的に利用するソーシャルメディアサイトは何ですか？
Multiple
0%
20%
40%
60%
80%
100%
1

Instagram

421
2

LinkedIn

402
3

Reddit

399
4

Twitter/X

266
5

Facebook

189
6

Bluesky

80
7

TikTok

56
8

Threads

47
9

Mastodon

34
10

🚫 該当なし

86
11

Other Answers

23
0%
20%
40%
60%
80%
100%
回答数に占める割合（%）
852
84%
10