About

Understanding the human brain requires knowing how it communicates within itself and with the body, and how these interactions shape development and function across neurons, vascular systems, and other tissues. Capturing this complexity in a controlled, experimentally accessible way remains a fundamental challenge in neuroscience.

We address this challenge through engineering. By combining human stem cell biology, tissue engineering, microfluidics, and advanced multiphoton imaging, we build microphysiological systems that reconstruct key aspects of human brain development. These models let us observe how human tissues develop, communicate, and respond to perturbations in ways conventional models cannot. Our goal is not to miniaturize human tissue but to ask new questions about neuroscience for learning and memory and identify therapeutic strategies for neuromuscular and neurodevelopmental disorders.

Our favorite engineering and development tool

Microfludics & electrophysiological recording

Microfluidic devices with electrodes for recording neural activity.

See
Osaki et al., Nat. Comms, 2024
Osaki et al., Scientific Reports. 2018

A diagram showing a scientific setup with labeled components: light stimulation source on the left, a green structure representing motor neurons in the center, and an elongated orange structure representing muscle fibers on the right. Green lines connect the motor neurons to the muscle fibers.

Neuromuscular-on-a-chip

Motor neurons and muscle cells co-cultured on a chip to investigate the underlying mechanisms of ALS.

See
Osaki et al., Science Advances, 2018
Osaki et al., Nature Protocols, 2020

A digital rendering of a sphere with interconnected neural network-like structures in green, purple, and white colors.

Genome editing in Stem cell and brain organoids

Engineering iPS cells and brain organoids to model human brain disease

See
Osaki et al., Nat. Comms, 2026
Osaki et al., Molecular Psychiatry. 2026

Three horizontal digital visual representations of neuron connections, showing neon green, purple, and multicolored node structures connected by glowing lines against a black background.

Advanced organoids-on-a-chip

Brain organoids connected on microfluidic chips to study neural circuits.

See
Osaki et al., Nat. Comms, 2024

Microscopic image of a single cell with a blue nucleus surrounded by pink cytoskeleton and smaller blue dots in the background.

Neurovascular-on-a-chip

Models of neurons, glia, and blood vessels to study neurovascular interactions.

See
Osaki et al., Scientific Reports, 2018
Osaki et al., Molecular Psychiatry. 2026

Laboratory setup with an electronic control system and a computer monitor displaying a neural network diagram. The system includes various electronic components, wires, and mechanical parts on a black reflective surface, with some amplifiers or power supplies and a brown table or platform in the background.

Advanced microscopy for
all optical electrophysiology

Multiphoton imaging with machine learning to decode neuronal activity.

See
Osaki et al., Light: Science& Applications, 2025

Our favorite questions

1.

Motor Function and Its Disease-Related Dysregulation

How motor neuron degeneration were triggered in Amyotrophic lateral sclerosis?

- Why motor neuron is selectively died in ALS?

- What is the contribution of sensory neurons in ALS?

- How ocular motor neuron escape from neurodegeneration in ALS?

Medical illustration of ALS motor neuron degeneration, showing preserved oculomotor neurons, sensory neurons, axon degeneration, neuromuscular junctions, TDP-43 aggregates, and an NMJ-on-a-chip model.

2.

Cortical Development and Plasticity

How long-range cortical input contribute to cortical plasticity & neurodevelopment? 

Scientific illustration of a microfluidic brain model linking a locus coeruleus neuromodulatory organoid to a cortical organoid, with long-range norepinephrine axons and an inset showing cortical neurons, synapses, and astrocytes.

— How neuromodulatory projection from mid brain or hind brain contribute to modulate internal state in cortex.

— In neurodevelopmental disorder such as Rett syndrome and Autism spectrum disorder, how these projection contribute to corticogenesis and underlying the mechanism of parthenogenesis?

3.

Learning and Memory with AI and living system

How can we implement microphysiological system and AI virtual cell to understand fundamental principle of learning & memory?

-  What is needed for in vitro engineered living system to be evaluated as model for clinical trial and drug screening

Illustration of a brain organoid microphysiological system with functional readout, AI-powered analysis, and neural circuitry representing learning and memory principles

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