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Employment (4)

Osaka University: Osaka, JP

2025-02-01 to present | Associate Professor
Employment
Source: Self-asserted source
Daichi Amagata

Osaka University: Osaka, JP

2015-04-01 to 2025-01-31 | Assistant Professor
Employment
Source: Self-asserted source
Daichi Amagata

Japan Science and Technology Agency: Tokyo, JP

2019-10-01 to 2022-03-31 | PRESTO Researcher
Employment
Source: Self-asserted source
Daichi Amagata

Japan Society for the Promotion of Science: Tokyo, JP

2014-04-01 to 2015-03-31 | Research Fellowship
Employment
Source: Self-asserted source
Daichi Amagata

Works (50 of 76)

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An Efficient Framework for Approximate Nearest Neighbor Search on High-Dimensional Multi-metric Data

2025 | Book chapter
Contributors: Reon Uemura; Daichi Amagata; Takahiro Hara
Source: check_circle
Crossref

Mutual Information-based Preference Disentangling and Transferring for Non-overlapped Multi-target Cross-domain Recommendations

2024-07-10 | Conference paper
Contributors: Zhi Li; Daichi Amagata; Yihong Zhang; Takahiro Hara; Shuichiro Haruta; Kei Yonekawa; Mori Kurokawa
Source: check_circle
Crossref

Efficient Density-peaks Clustering Algorithms on Static and Dynamic Data in Euclidean Space

ACM Transactions on Knowledge Discovery from Data
2024-01-31 | Journal article
Contributors: Daichi Amagata; Takahiro Hara
Source: check_circle
Crossref

Categorical Diversity-Aware Inner Product Search

IEEE Access
2023 | Journal article
Contributors: Hirata, Kohei; Amagata, Daichi; Fujita, Sumio; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Diversity Maximization in the Presence of Outliers

Proceedings of the AAAI Conference on Artificial Intelligence
2023 | Conference paper
Contributors: Amagata, Daichi
Source: Self-asserted source
Daichi Amagata

Learned spatial data partitioning

Proceedings of the Sixth International Workshop on Exploiting Artificial Intelligence Techniques for Data Management
2023 | Conference paper
Contributors: Hori, Keizo; Sasaki, Yuya; Amagata, Daichi; Murosaki, Yuki; Onizuka, Makoto
Source: Self-asserted source
Daichi Amagata

Reverse Maximum Inner Product Search: Formulation, Algorithms, and Analysis

ACM Transactions on the Web
2023 | Journal article
Contributors: Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Semantic Relation Transfer for Non-overlapped Cross-domain Recommendations

Pacific-Asia Conference on Knowledge Discovery and Data Mining
2023 | Conference paper
Contributors: Li, Zhi; Amagata, Daichi; Zhang, Yihong; Hara, Takahiro; Haruta, Shuichiro; Yonekawa, Kei; Kurokawa, Mori
Source: Self-asserted source
Daichi Amagata

Simpler is Much Faster: Fair and Independent Inner Product Search

2023-07-19 | Conference paper
Contributors: Kazuyoshi Aoyama; Daichi Amagata; Sumio Fujita; Takahiro Hara
Source: check_circle
Crossref

Fast Algorithm for Embedded Order Dependency Validation

2023-07-10 | Conference paper
Contributors: Daichi Amagata; Alejandro Ramos; Ryo Shirai; Takahiro Hara
Source: check_circle
Crossref

User-irrelevant Cross-domain Association Analysis for Cross-domain Recommendation with Transfer Learning

2023-06-12 | Conference paper
Contributors: Hao Niu; Duc Nguyen; Kei Yonekawa; Mori Kurokawa; Chihiro Ono; Daichi Amagata; Takuya Maekawa; Takahiro Hara
Source: check_circle
Crossref

A Performance Study of One-dimensional Learned Cardinality Estimation.

2022 | Conference paper
Contributors: Ji, Yuchen; Amagata, Daichi; Sasaki, Yuya; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Cardinality estimation in inner product space

IEEE Open Journal of the Computer Society
2022 | Journal article
Contributors: Hirata, Kohei; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Debiasing graph transfer learning via item semantic clustering for cross-domain recommendations

2022 IEEE International Conference on Big Data (Big Data)
2022 | Conference paper
Contributors: Li, Zhi; Amagata, Daichi; Zhang, Yihong; Hara, Takahiro; Haruta, Shuichiro; Yonekawa, Kei; Kurokawa, Mori
Source: Self-asserted source
Daichi Amagata

Efficient retrieval of top-k weighted spatial triangles

International Conference on Database Systems for Advanced Applications
2022 | Conference paper
Contributors: Taniguchi, Ryosuke; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Efficient retrieval of top-k weighted triangles on static and dynamic spatial data

IEEE Access
2022 | Journal article
Contributors: Taniguchi, Ryosuke; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Fast, exact, and parallel-friendly outlier detection algorithms with proximity graph in metric spaces

The VLDB Journal
2022 | Journal article
Contributors: Amagata, Daichi; Onizuka, Makoto; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

HML4Rec: Hierarchical meta-learning for cold-start recommendation in flash sale e-commerce

Knowledge-Based Systems
2022 | Journal article
Contributors: Li, Zhi; Amagata, Daichi; Zhang, Yihong; Maekawa, Takuya; Hara, Takahiro; Yonekawa, Kei; Kurokawa, Mori
Source: Self-asserted source
Daichi Amagata

Learned k-nn distance estimation

Proceedings of the 30th International Conference on Advances in Geographic Information Systems
2022 | Conference paper
Contributors: Amagata, Daichi; Arai, Yusuke; Fujita, Sumio; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Retrieving Top-N Weighted Spatial k-cliques

2022 IEEE International Conference on Big Data (Big Data)
2022 | Conference paper
Contributors: Taniguchi, Ryosuke; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Scalable and Accurate Density-Peaks Clustering on Fully Dynamic Data

2022 IEEE International Conference on Big Data (Big Data)
2022 | Conference paper
Contributors: Amagata, Daichi
Source: Self-asserted source
Daichi Amagata

Solving diversity-aware maximum inner product search efficiently and effectively

Proceedings of the 16th ACM Conference on Recommender Systems
2022 | Conference paper
Contributors: Hirata, Kohei; Amagata, Daichi; Fujita, Sumio; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Trends-enhanced attention & memory networks for ecommerce recommendation

SIGIR Workshop on ECommerce
2022 | Conference paper
Contributors: Li, Zhi; Amagata, Daichi; Maekawa, Takuya; Yonekawa, Kei; Kurokawa, Mori; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Approximate top-k inner product join with a proximity graph

2021 IEEE International Conference on Big Data (Big Data)
2021 | Conference paper
Contributors: Nakama, Hayato; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Automatic identification of differences in behavioral co-occurrence between groups

Animal Biotelemetry
2021 | Journal article
Contributors: Tian, Yiming; Maekawa, Takuya; Korpela, Joseph; Amagata, Daichi; Hara, Takahiro; Matsumoto, Sakiko; Yoda, Ken
Source: Self-asserted source
Daichi Amagata

Concept Drift Detection with Denoising Autoencoder in Incomplete Data

International Conference on Mobile and Ubiquitous Systems: Computing, Networking, and Services
2021 | Conference paper
Contributors: Murao, Jun; Yonekawa, Kei; Kurokawa, Mori; Amagata, Daichi; Maekawa, Takuya; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Fast and exact outlier detection in metric spaces: a proximity graph-based approach

Proceedings of the 2021 International Conference on Management of Data
2021 | Conference paper
Contributors: Amagata, Daichi; Onizuka, Makoto; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Fast density-peaks clustering: multicore-based parallelization approach

Proceedings of the 2021 International Conference on Management of Data
2021 | Conference paper
Contributors: Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Feat-sksj: Fast and exact algorithm for top-k spatial-keyword similarity join

Proceedings of the 29th International Conference on Advances in Geographic Information Systems
2021 | Conference paper
Contributors: Amagata, Daichi; Tsuruoka, Shohei; Arai, Yusuke; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Lgtm: A fast and accurate knn search algorithm in high-dimensional spaces

Database and Expert Systems Applications: 32nd International Conference, DEXA 2021, Virtual Event, September 27--30, 2021, Proceedings, Part II 32
2021 | Conference paper
Contributors: Arai, Yusuke; Amagata, Daichi; Fujita, Sumio; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Predicting Next-use Mobile Apps Using App Semantic Representations

Journal of Information Processing
2021 | Journal article
Contributors: Chen, Cheng; Maekawa, Takuya; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Reverse maximum inner product search: How to efficiently find users who would like to buy my item?

Proceedings of the 15th ACM Conference on Recommender Systems
2021 | Conference paper
Contributors: Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

A dnn-based cross-domain recommender system for alleviating cold-start problem in e-commerce

IEEE Open Journal of the Industrial Electronics Society
2020 | Journal article
Contributors: Wang, Hanxin; Amagata, Daichi; Makeawa, Takuya; Hara, Takahiro; Hao, Niu; Yonekawa, Kei; Kurokawa, Mori
Source: Self-asserted source
Daichi Amagata

Detecting Energy Depriving Malicious Nodes by Unsupervised Learning in Energy Harvesting Cooperative Wireless Sensor Networks

Journal of Information Processing
2020 | Journal article
Contributors: Gao, Boqi; Amagata, Daichi; Maekawa, Takuya; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Detecting reinforcement learning-based Grey hole attack in Mobile wireless sensor networks

IEICE Transactions on Communications
2020 | Journal article
Contributors: Gao, Boqi; Maekawa, Takuya; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Distributed spatial-keyword knn monitoring for location-aware pub/sub

Proceedings of the 28th International Conference on Advances in Geographic Information Systems
2020 | Conference paper
Contributors: Tsuruoka, Shohei; Amagata, Daichi; Nishio, Shunya; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Lamps: Location-aware moving top-k pub/sub

IEEE Transactions on Knowledge and Data Engineering
2020 | Journal article
Contributors: Nishio, Shunya; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

On the Transferability of Deep Neural Networks for Recommender System.

2020 | Conference paper
Contributors: Nguyen, Duc; Niu, Hao; Yonekawa, Kei; Kurokawa, Mori; Ono, Chihiro; Amagata, Daichi; Maekawa, Takuya; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

A Heterogeneous Domain Adversarial Neural Network for Trans-Domain Behavioral Targeting

Trends and Applications in Knowledge Discovery and Data Mining - PAKDD 2019 Workshops, BDM, DLKT, LDRC, PAISI, WeL, Macau, China, April 14-17, 2019, Revised Selected Papers
2019 | Conference paper
Contributors: Kei Yonekawa and Hao Niu and Mori Kurokawa and Arei Kobayashi and Daichi Amagata and Takuya Maekawa and Takahiro Hara; Leong Hou U and Hady W. Lauw
Source: Self-asserted source
Daichi Amagata

Advertiser-assisted behavioral ad-targeting via denoised distribution induction

2019 IEEE International Conference on Big Data (Big Data)
2019 | Conference paper
Contributors: Yonekawa, Kei; Niu, Hao; Kurokawa, Mori; Kobayashi, Arei; Amagata, Daichi; Maekawa, Takuya; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Behavior matching between different domains based on canonical correlation analysis

Companion Proceedings of The 2019 World Wide Web Conference
2019 | Conference paper
Contributors: Lyu, Yuan; Amagata, Daichi; Maekawa, Takuya; Hara, Takahiro; Niu, Hao; Yonekawa, Kei; Kurokawa, Mori
Source: Self-asserted source
Daichi Amagata

Correlation Set Discovery on Time-Series Data

Database and Expert Systems Applications - 30th International Conference, DEXA 2019, Linz, Austria, August 26-29, 2019, Proceedings, Part II
2019 | Conference paper
Contributors: Daichi Amagata and Takahiro Hara; Sven Hartmann and Josef Küng and Sharma Chakravarthy and Gabriele Anderst-Kotsis and A Min Tjoa and Ismail Khalil
Source: Self-asserted source
Daichi Amagata
grade
Preferred source (of 3)‎

Discord Monitoring for Streaming Time-Series

Database and Expert Systems Applications - 30th International Conference, DEXA 2019, Linz, Austria, August 26-29, 2019, Proceedings, Part I
2019 | Conference paper
Contributors: Shinya Kato and Daichi Amagata and Shunya Nishio and Takahiro Hara; Sven Hartmann and Josef Küng and Sharma Chakravarthy and Gabriele Anderst-Kotsis and A Min Tjoa and Ismail Khalil
Source: Self-asserted source
Daichi Amagata
grade
Preferred source (of 2)‎

Dynamic Set kNN Self-Join

35th IEEE International Conference on Data Engineering, ICDE 2019, Macao, China, April 8-11, 2019
2019 | Conference paper
Contributors: Daichi Amagata and Takahiro Hara and Chuan Xiao
Source: Self-asserted source
Daichi Amagata
grade
Preferred source (of 2)‎

Identifying the Most Interactive Object in Spatial Databases

35th IEEE International Conference on Data Engineering, ICDE 2019, Macao, China, April 8-11, 2019
2019 | Conference paper
Contributors: Daichi Amagata and Takahiro Hara
Source: Self-asserted source
Daichi Amagata

Preliminary Investigation of Alleviating User Cold-Start Problem in E-commerce with Deep Cross-Domain Recommender System

Companion of The 2019 World Wide Web Conference, WWW 2019, San Francisco, CA, USA, May 13-17, 2019
2019 | Conference paper
Contributors: Hanxin Wang and Daichi Amagata and Takuya Maekawa and Takahiro Hara and Hao Niu and Kei Yonekawa and Mori Kurokawa; Sihem Amer-Yahia and Mohammad Mahdian and Ashish Goel and Geert-Jan Houben and Kristina Lerman and Julian J. McAuley and Ricardo Baeza-Yates and Leila Zia
Source: Self-asserted source
Daichi Amagata

Preliminary Investigation of Predicting Next-Use Mobile Apps Using App Semantic Representations

IEEE International Conference on Pervasive Computing and Communications Workshops, PerCom Workshops 2019, Kyoto, Japan, March 11-15, 2019
2019 | Conference paper
Contributors: Cheng Chen and Takuya Maekawa and Daichi Amagata and Takahiro Hara
Source: Self-asserted source
Daichi Amagata
grade
Preferred source (of 2)‎

Upsampling inertial sensor data from wearable smart devices using neural networks

2019 IEEE 39th International Conference on Distributed Computing Systems (ICDCS)
2019 | Conference paper
Contributors: Yoshimura, Naoya; Maekawa, Takuya; Amagata, Daichi; Hara, Takahiro
Source: Self-asserted source
Daichi Amagata

Detecting Door Events Using a Smartphone via Active Sound Sensing

Proc. ACM Interact. Mob. Wearable Ubiquitous Technol.
2018 | Journal article
Contributors: Thilina Dissanayake and Takuya Maekawa and Daichi Amagata and Takahiro Hara
Source: Self-asserted source
Daichi Amagata

Developing a Competency-based System to Enhance Knowledge Management Program

9th International Conference on Awareness Science and Technology, iCAST 2018, Fukuoka, Japan, September 19-21, 2018
2018 | Conference paper
Contributors: Yujia Wang and Chalermpon Kongjit and Takahiro Hara and Daichi Amagata
Source: Self-asserted source
Daichi Amagata
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Peer review (1 review for 1 publication/grant)

Review activity for The VLDB journal. (1)