About me

I received my PhD from Tohoku University in Japan, with a thesis focused on aggregation behaviors in Drosophila melanogaster:

“Quantification of aggregation behaviors in Drosophila melanogaster ― their underlying neuropeptides and brain areas”

Now I am a researcher at the Connectome Analysis Unit, RIKEN Center for Brain Science, Japan with Dr. Alexander Woodward, focusing functional connectome analysis of fMRI BOLD signals for Japan’s Brain/MINDS project.

Some of my work:

GSDGM and MTESS toolbox (MATLAB & Python script) :

The GSDGM and MTESS Toolbox is a powerful tool for surrogate data generation and multivariate time-series similarity analysis. Three GSDGM algorithms have been implemented to generate group surrogate data: 1) Vector Auto-Regression (VAR) surrogate (R. Liégeois, et al., 2017), 2) Principal Component VAR (PCVAR) surrogate, and 3) Vector Auto-Regressive Deep Neural Network (VARDNN) surrogate (T.Okuno and A.Woodward, 2021). MTESS can quantify the similarity between two multivariate time-series. It is composed of the normalized distance or cos-similarity of seven basic statistical properties. These are the standard deviation, auto-correlation, partial auto-correlation, correlation matrix, partial correlation matrix, cross-correlation matrix and partial cross-correlation matrix, and multivariate kurtosis. The difference between two multivariate time-series is expressed by a single value [0, 5] (0: not similar to 5: similar)(MTESS).

Github repository (MATLAB version), Github repository (Python version)

VARDNN toolbox (MATLAB & Python script) :

VARDNN is a powerful tool of data-driven analysis technique to estimate directed FC (Functional Connectivity). Based on VARDNN framework, two types of directed FC are defined, such as VARDNN-DI and VARDNN-GC to measure causal relation among multiple time-series data.

Github repository (MATLAB version), Github repository (Python version)

NWB format convert tool (MATLAB script) :

This tool could generate a NWB format file from an excel template file and raw image files.

Github repository

Quade’s test (MATLAB script) :

Quade’s test is nonparametric or rank analysis of covariance (ANCOVA). This implementation is based on Quade, D. (1967). Rank analysis of covariance. Journal of the American Statistical Association, 62(320), 1187-1200

Github repository

TPro (MATLAB script) :

TPro is detection and tracking software for small animals (Drosophila melanogaster, mouse, etc.). This software have useful and user friendly GUI, and is able to analyze animal behaviors.

Github repository

Posters: