Kubota Naoki 久保田直樹

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KUBOTA Naoki 久保田直樹

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Researcher Number	20754972
Other IDs
Affiliation (Current)	2026: 日本大学, 理工学部, 准教授
Affiliation (based on the past Project Information) *help	2021 – 2025: 日本大学, 理工学部, 准教授 2016 – 2020: 日本大学, 理工学部, 助教
Review Section/Research Field	Principal Investigator Basic Section 12010:Basic analysis-related / Basic analysis
Keywords	Principal Investigator フロッグモデル / 確率論 / ランダムポテンシャル中の乱歩 / ファーストパッセージパーコレーション / 不規則媒質中の乱歩 / パーコレーション / 不規則媒質 / ランダムウォーク / 正則性 / 時間定数 / 連続性 / レート関数 / 大偏差原理

競合が生み出す拡散現象の解析Principal Investigator
- Principal Investigator
  
  久保田直樹
- Project Period (FY)
  2025 – 2029
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 12010:Basic analysis-related
- Research Institution
  Nihon University
Differences in diffusion phenomena caused by environmental changesPrincipal Investigator
- Principal Investigator
  
  KUBOTA Naoki
- Project Period (FY)
  2020 – 2024
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 12010:Basic analysis-related
- Research Institution
  Nihon University
Fluctuation spreading from random environments to random walksPrincipal Investigator
- Principal Investigator
  
  KUBOTA Naoki
- Project Period (FY)
  2016 – 2020
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Basic analysis
- Research Institution
  Nihon University

All 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016

All Journal Article Presentation

[Journal Article] Lipschitz-Type Estimate for the Frog Model with Bernoulli Initial Configuration2025
- Author(s)
  Van Hao Can, Naoki Kubota, Shuta Nakajima
- Journal Title
  
  Mathematical Physics, Analysis and Geometry
  
  Volume: 28 Issue: 1 Pages: 1-40
- DOI
  10.1007/s11040-024-09497-6
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14332, KAKENHI-PROJECT-22K20344, KAKENHI-PROJECT-24K16937, KAKENHI-PROJECT-23KK0050
[Journal Article] Differences between Lyapunov exponents for the simple random walk in Bernoulli potentials2024
- Author(s)
  Kubota Naoki
- Journal Title
  
  Journal of Applied Probability
  
  Volume: 61 Issue: 1 Pages: 82-103
- DOI
  10.1017/jpr.2023.35
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-20K14332
[Journal Article] Strict comparison for the Lyapunov exponents of the simple random walk in random potentials2023
- Author(s)
  Kubota Naoki
- Journal Title
  
  Latin American Journal of Probability and Mathematical Statistics
  
  Volume: 20 Issue: 2 Pages: 989-989
- DOI
  10.30757/alea.v20-36
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-20K14332
[Journal Article] Comparison of limit shapes for Bernoulli first-passage percolation2022
- Author(s)
  Kubota Naoki、Takei Masato
- Journal Title
  
  International Journal of Mathematics for Industry
  
  Volume: 14 Issue: 01 Pages: 2250005-2250005
- DOI
  10.1142/s2661335222500058
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-22K03333, KAKENHI-PROJECT-20K14332, KAKENHI-PROJECT-19K03514, KAKENHI-PROJECT-19H01793
[Journal Article] Gaussian fluctuation for superdiffusive elephant random walks2019
- Author(s)
  Naoki Kubota, Masato Takei
- Journal Title
  
  Journal of Statistical Physics
  
  Volume: 177 Issue: 6 Pages: 1157-1171
- DOI
  10.1007/s10955-019-02414-0
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-19K03514, KAKENHI-PROJECT-16K17620
[Journal Article] Continuity for the Rate Function of the Simple Random Walk on Supercritical Percolation Clusters2019
- Author(s)
  Naoki Kubota
- Journal Title
  
  Journal of Theoretical Probability
  
  Volume: - Issue: 4 Pages: 1948-1973
- DOI
  10.1007/s10959-019-00936-7
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K17620
[Journal Article] Deviation bounds for the first passage time in the frog model2019
- Author(s)
  Naoki Kubota
- Journal Title
  
  Advances in Applied Probability
  
  Volume: 51
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K17620
[Journal Article] Slowdown estimates for one-dimensional random walks in random environment with holding times2018
- Author(s)
  Amir Dembo、Ryoki Fukushima、Naoki Kubota
- Journal Title
  
  Electronic Communications in Probability
  
  Volume: 23 Issue: none Pages: 1-12
- DOI
  10.1214/18-ecp191
- NAID
  120006644043
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17620, KAKENHI-PROJECT-16K05200, KAKENHI-PROJECT-17H01093, KAKENHI-PROJECT-18H03672
[Presentation] Divergence of the time constant for the frog model with Bernoulli initial configurations2025
- Author(s)
  久保田直樹
- Organizer
  新潟確率論ワークショップ
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] Divergence of the time constant for the frog model with Bernoulli initial configurations2024
- Author(s)
  Naoki Kubota
- Organizer
  Japanese-Netherlands workshop“Random Media and Random Fields”
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] フロッグモデルに関するリプシッツ連続性について2024
- Author(s)
  久保田直樹
- Organizer
  無限粒子系、確率場の諸問題XVIII
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] Monotonicity of the time constant for the frog model with Bernoulli initial configurations2024
- Author(s)
  Naoki Kubota
- Organizer
  Random Fields and Processes on Graphs and Fractals
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] フロッグモデルの時間定数におけるリプシッツ型評価2023
- Author(s)
  久保田直樹
- Organizer
  日本数学会2023年度年会
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] Lipschitz-type estimates for the frog model with the Bernoulli initial configuration2023
- Author(s)
  Naoki Kubota
- Organizer
  Workshop on Probabilistic Methods in Statistical Mechanics of Random Media and Random Fields 2023
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] Strict comparison for the Lyapunov exponents of the simple random walk in random potentials2022
- Author(s)
  Naoki Kubota
- Organizer
  Workshop on Probabilistic Methods in Statistical Mechanics of Random Media and Random Fields 2022
- Invited
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] Strict comparison for the Lyapunov exponents of the simple random walk in random potentials2022
- Author(s)
  Naoki Kubota
- Organizer
  Probability and Analysis on Random Structures and Related Topics
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] ランダムポテンシャル中のシンプルランダムウォークにおけるリアプノフ指数の狭義単調性2022
- Author(s)
  久保田直樹
- Organizer
  東京確率論セミナー
- Invited
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] Strict comparison for the Lyapunov exponents of the simple random walk in random potentials2021
- Author(s)
  久保田直樹
- Organizer
  The 19th Symposium "Stochastic Analysis on Large Scale Interacting Systems"
- Invited
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] Strict comparison for the Lyapunov exponents of the simple random walk in random potentials2021
- Author(s)
  久保田直樹
- Organizer
  無限粒子系、確率場の諸問題XVI
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] フロッグモデルにおける粒子の拡散について2020
- Author(s)
  久保田直樹
- Organizer
  霧島確率論セミナー
- Invited
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Continuity for the asymptotic shape in the frog model with random initial configurations2020
- Author(s)
  Naoki Kubota
- Organizer
  Bernoulli-IMS One World Symposium 2020
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-20K14332
[Presentation] Continuity for the asymptotic shape in the frog model with random initial configurations2019
- Author(s)
  Naoki Kubota
- Organizer
  Rigorous Statistical Mechanics and Related Topics
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] フロッグモデルにおける漸近形状の連続性について2019
- Author(s)
  久保田直樹
- Organizer
  大阪大学確率論セミナー
- Invited
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Continuity for the asymptotic shape in the frog model with random initial configurations2019
- Author(s)
  久保田直樹
- Organizer
  日本数学会2019年度秋季総合分科会
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Continuity result for the rate function of the simple random walk on supercritical percolation clusters2019
- Author(s)
  久保田直樹
- Organizer
  福岡大学確率論セミナー
- Invited
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Continuity of the rate function for the simple random walk on percolation clusters2019
- Author(s)
  Naoki Kubota
- Organizer
  Japan Netherlands workshop "Probabilistic methods in statistical mechanics of random media"
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Continuity for the rate function of the simple random walk on supercritical percolation clusters2019
- Author(s)
  久保田直樹
- Organizer
  無限粒子系、確率場の諸問題XIV
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Continuity result for the rate function of the simple random walk on supercritical percolation clusters2018
- Author(s)
  Naoki Kubota
- Organizer
  17th International symposium "Stochastic Analysis on Large Scale Interacting Systems"
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Upper tail estimates for the first passage time in the frog model2017
- Author(s)
  Naoki Kubota
- Organizer
  Japanese-German Open Conference on Stochastic Analysis 2017
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Upper tail estimates for the first passage time in the frog model2017
- Author(s)
  久保田直樹
- Organizer
  無限粒子系、確率場の諸問題XII
- Place of Presentation
  奈良女子大学（奈良県奈良市）
- Year and Date
  2017-01-22
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Tail estimates for the first passage time in the frog model2017
- Author(s)
  Naoki Kubota
- Organizer
  16th International symposium "Stochastic Analysis on Large Scale Interacting Systems"
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Continuity results for the frog model in random initial configurations2017
- Author(s)
  Naoki Kubota
- Organizer
  One-day Workshop on Asymptotic and Potential Analysis of Stochastic Processes
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] 不規則媒質中の乱歩に対する大偏差原理とリアプノフ指数2016
- Author(s)
  久保田直樹
- Organizer
  日本数学会2016年度秋季総合分科会（統計数学分科会特別講演）
- Place of Presentation
  関西大学（大阪府吹田市）
- Year and Date
  2016-09-15
- Invited
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] Concentration inequalities for the simple random walk in unbounded nonnegative potentials2016
- Author(s)
  Naoki Kubota
- Organizer
  Workshop on percolation, spin glasses and random media
- Place of Presentation
  イリノイ州エバンストン（アメリカ合衆国）
- Year and Date
  2016-05-29
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K17620
[Presentation] フロッグモデルにおける情報伝達速度の末尾評価2016
- Author(s)
  久保田直樹
- Organizer
  平成28年度（第60回）日本大学理工学部学術講演会
- Place of Presentation
  日本大学理工学部（東京都千代田区）
- Year and Date
  2016-12-03
- Data Source
  KAKENHI-PROJECT-16K17620

1. TAKEI Masato

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results

Kubota Naoki 久保田 直樹

KUBOTA Naoki 久保田 直樹

Research Projects

Research Products

Co-Researchers

競合が生み出す拡散現象の解析Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Differences in diffusion phenomena caused by environmental changesPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Fluctuation spreading from random environments to random walksPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Lipschitz-Type Estimate for the Frog Model with Bernoulli Initial Configuration2025

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Differences between Lyapunov exponents for the simple random walk in Bernoulli potentials2024

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Strict comparison for the Lyapunov exponents of the simple random walk in random potentials2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Comparison of limit shapes for Bernoulli first-passage percolation2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Gaussian fluctuation for superdiffusive elephant random walks2019

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Continuity for the Rate Function of the Simple Random Walk on Supercritical Percolation Clusters2019

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Deviation bounds for the first passage time in the frog model2019

Author(s)

Journal Title

Data Source

[Journal Article] Slowdown estimates for one-dimensional random walks in random environment with holding times2018

Author(s)

Journal Title

DOI

NAID

Data Source

[Presentation] Divergence of the time constant for the frog model with Bernoulli initial configurations2025

Author(s)

Organizer

Data Source

[Presentation] Divergence of the time constant for the frog model with Bernoulli initial configurations2024

Author(s)

Organizer

Data Source

[Presentation] フロッグモデルに関するリプシッツ連続性について2024

Author(s)

Organizer

Data Source

[Presentation] Monotonicity of the time constant for the frog model with Bernoulli initial configurations2024

Author(s)

Organizer

Data Source

[Presentation] フロッグモデルの時間定数におけるリプシッツ型評価2023

Kubota Naoki 久保田直樹

KUBOTA Naoki 久保田直樹