Definition of Terms
Perceiving the changes in symptoms associated with the disease as bodily sensations, and making sense of and interpreting the uncertain and ambiguous information associated with the disease, while viewing the experience as a disease that encompasses the very limitations and restrictions associated with the disease.

Illness perception is perceived changes in symptoms associated with a disease as physical sensations and given meaning to and interpreting uncertain Illness perception is perceived changes in symptoms associated with a disease as physical sensations and given meaning to and interpreting uncertain and ambiguous information related to the disease, while capturing experiences that encompass restrictions and constraints from the disease itself.

Explanation of Terms
　The "illness" and "diseaseThe concept of "illness" is "the experience of pain or other specific symptoms or afflictions" by the person experiencing the illness, and "the recognition of symptoms or incapacitation, along withliving(Kleinman, 1988/1996), and "a term that emphasizes the patient's experience and subjective perception" (Katayama, Kodama, & Nagata, 2009), and is fundamentally different from "disease" and "disorder," which focus on changes in biological structure and function from the therapist's viewpoint (Kleinman, 1988/1996). The terms are treated as fundamentally different from "disease" and "disorder," which focus on changes in biological structure and function from the healer's perspective (Kleinman, 1988/ 1996).
　illness perception Most of the research on illness perception and disease perception has been conducted with chronically ill patients in adulthood based on Leventhal et al.'s concept of illness perception (Leventhal et al.,1980), and the illness perception of diabetic patients is influenced by personal and cultural beliefs and influence adherence to a treatment plan (Barnes, MossMorris & Kaufusi, 2004), that positive affective representations included in the disease perception of hemodialysis patients positively influence their adjustment to the disease as patients (Katayama, Kodama, & Nagata, 2010), and that some disease characteristics may influence a person's (Katayama, Kodama, and Nagata, 2010), and that some disease characteristics may cause a person to have mixed healthperception and illness perception, and to oscillate between the two (Kato and Katsuno, 2015).
　Walker, Papado, Poulos, Lipton, & Hussein (2006), on the other hand, found no fundamental difference in the structure of the self-regulatory model including illness perception and coping behaviors between childhood and adult patients, and that the framework of Leventhal's self-regulatory model (Leventhal et al., 1980) can be used in children. The framework of Leventhal's self-regulation model (Leventhal et al., 1980) can be used in children, and the process includes the child-specific characteristics of cognition and coping behaviors.developmentstage, reporting that the child's experience may have a significant impact.
　The definition of Illness Perception was derived from an analysis using Rodgers' method of conceptual analysis (Rodgers, 2000).
　The following attributes were extracted as "illness perception of children with chronic illnesses": [illness perception through physical sensation], [illness perception through limitation/constraint], [uncertain interpretation of illness information], and [making sense of illness]. The antecedents of "illness perception of children with chronic illnesses" were extracted as "individual characteristics of children," "characteristics of illness and treatment," "caregivers' attitudes toward sick children," and "information about illness received by children," and the consequences were "conflicts caused by having illness," and "perceptions of illness as a result of illness.self-conceptThe two most important factors were [penetration of the disease into the patient] and [deciding on one's own coping behavior toward the disease] (Suzuki, Tomari, 2020).
　Children's cognition, a characteristic of children that influences children's perception of illness.developmentThe fact that the stages are constantly changing and that the information the child obtains about the illness/disease is often controlled by the health care provider or caregiver may have a significant impact on the child's "interpretation" of the illness perception.
　Furthermore, factors related to caregivers are known to influence children's perception of illness (Bornstein, 2015). The caregiver's attitude toward caregiving, the caregiver's own perception of the child's illness, and how the caregiver intends to provide information to the child may naturally influence not only the content of the information conveyed about the illness itself, but also the child's own perception of the illness.
　Conceptualization of pain and discomfort, which are physical sensations that only the child can directly feel, is thought to proceed through the process of sharing these indirect experiences with others, such as caregivers, after birth.
　In addition, although the perception of symptoms as bodily sensations can be felt with changes in size, in the case of congenital diseases and childhood-onset chronic diseases, normality as a base point cannot be perceived, and therefore, the illness perception of children with these diseases can be said to have unique characteristics. Regarding the perception of illness due to limitations and restrictions, it can be said that the illness of the selflivingThe first step is to consider the impact and limitations of the disease on the child's development. In terms of the developmental characteristics of children with chronic illnesses, the limitations and restrictions of the illness arepreventionThe difficulty in understanding the causal relationship between the disease and the child is that it is a limitation or restriction to remove the aggravating factor in a situation where the child does not always perceive the disease due to the instability and inconsistency of symptoms characteristic of chronic illnesses. The difficulty in understanding the causal relationship between the child and the disease, and the awareness of the limitations/constraints associated with the existence of the disease in the context of differences between the self and others, are characteristics of [disease perception through limitations/constraints] as attributes in the child's conception of disease perception.
　In addition, this [perception of illness due to limitations and restrictions] is an aspect of illness that is recognized through the child's repeated experiences of not being able to do various activities in daily life and social life because of the illness, and is also an aspect of the child's subsequent coping behavior, ways of interacting with others, and ways of thinking about the child's own life and the lives of others. The way the child copes and interacts with others after the illness.self-conceptIt was also considered to have a significant impact on identity formation.
　The "perception of illness through bodily sensations," which is a feeling that accompanies symptoms from within the body as an attribute of illness perception, and the "perception of illness through restrictions and limitations," which is aware of the existence of internal illness and its overlapping imposed by others outside the body, are interrelated and lead to [uncertain interpretation of illness information] and [meaning of illness] by being recognized through the characteristics of the cognitive development of children in a chaotic situation caused by the instability, complexity, and inconsistency of symptoms as a characteristic of chronic illness. The existence of internal illness and [illness perception due to limitations and restrictions], which is perceived by being imposed on it by external others, are interrelated and lead to [uncertain interpretation of illness information] and [illness meaning-making] as they are perceived through the characteristics of children's cognitive development in a chaotic situation caused by the instability of symptoms, complexity, and difficulty in grasping consistency as a characteristic of chronic illness (Suzuki, Tomari, 2020).
　From the attribute categories of illness cognition in children with chronic illness, we defined illness cognition in children with chronic illness as "making sense of and interpreting uncertain and ambiguous information associated with illness while perceiving the changes in symptoms associated with illness as bodily sensations and viewing the experience as illness that encompasses the restrictions and limitations associated with illness itself" (Suzuki, Tomari, 2020).
　The definition of children's perception of illness (Suzuki, Tomari, 2020) was extracted through an analysis of children's developmental characteristics, but was redefined as "awareness of illness" because it is a universal and common concept not only among children, but also among adults with illness. The phenomenon is redefined as "recognition of illness".

References
Barnes, L., Moss-Morris, R., & Kaufusi, M. (2004): Illness beliefs and adherence in diabetes mellitus: A comparison between Tongan and European New Zealand Medical Journal,117(1188),1-9.
In Lerner, R.H., (Ed.),Handbook of child psychology and developmental science. Ecological and processes in developmental systems (7th edition), Wiley & Sons, New York.
Kleinman, A. (1988) / Eguchi, S., Gokita, S., Ueno, G. (1996): Narrating illness: Clinical anthropology on chronic illness, Seishinshobo, Tokyo.
F. Katayama, M. Kodama, and H. Osada (2009): Creation, reliability, and validity of the Japanese version of the illness perception questionnaire: Validation by hemodialysis patients. Journal of Health Psychology, 22(2), 8-39.
F. Katayama, M. Kodama, and H. Osada (2010): Influence of disease perception on disease adjustment in hemodialysis patients. Human Care Research, 11(1), 21-31.
. Kato, T. and Katsuno, T. (2015): Conceptual analysis of health-illness perception, Journal of the Japan Society for Health Sciences,18(2),51-58 . Available from: https://www.health-sciences.jp/journal/backnumber/018_02.pdf
Leventhal,H.,Mayer,D.,&Nerenz,D.(1980):The common sense representation of llness danger.In Rachman,S(Ed.),Contributions to medical psychology(Vol.2,pp.7-30).New York:Pergamon Press.
・ Rodgers,B.L.(2000):Concepts analysis An Evolutionary View.InRodgers,B.L.,Knafl,K.A.(Eds),ConceptDevelopment in Nursing; Foundations,. Technic and Applications second Edition, Saunders Company, Philadelphia.
Suzuki, Misa, Tomari, Yuko (2020): Conceptual analysis of "illness perception of children with chronic diseases". Journal of the Japanese Society of Nursing Research, 43(4), 745-756.
Walker,C.,Papadopoulos,L.,Lipton,M.,et,al.(2006):The importance of children's illness beliefs:The Children's Illness Perception Questionnaire (CIPQ) as a reliable assessment tool for eczema and asthma,Psychology Health & Medicine.11(1),100-107.